Free Online Utility Tools

Use image, PDF, calculator and developer tools right in your browser — no installation required. Everything runs on your own device and your files are never uploaded to a server.

Image Editing 26

Image Compressor
Reduce the size of JPG, PNG, and WebP images right in your browser
Image Resizer
Resize images precisely by pixels or percentage
Rotate & Flip Image
Rotate images 90, 180, or 270 degrees or flip them horizontally or vertically, then save
Black & White Converter
Convert color images to black and white (grayscale) and download
Invert Colors (Negative)
Invert an image's colors for a negative-film effect and save
Circle Crop
Crop images into a circle and save as transparent PNG (for profile pictures)
Add Border
Add a border (frame) around your image in any color and thickness
Blur Image
Softly blur a photo with an adjustable intensity slider
Round Corners
Round image corners to any radius and save as a transparent PNG
Add Text to Image
Overlay text on a photo and adjust its color, size, and position
Pixelate / Censor
Pixelate an image to hide sensitive information
EXIF Remover
Strip location and camera data for a clean, share-ready photo
Meme Generator
Add Impact-style white text with a black outline to the top and bottom of an image, then download your meme
Brightness, Contrast & Saturation
Adjust brightness, contrast, and saturation with live preview, then download
Add Image Watermark
Add a text watermark to photos with adjustable opacity, position, and tiled repeat, then save
Code Screenshot Beautifier
Wrap code or text in a gradient background and window frame to save as a social-ready image
Photo Collage Maker
Combine multiple photos into a grid layout with adjustable spacing and background color, saved as one image
Device Mockup Frame
Place a screenshot in a browser or smartphone frame and save it as a mockup image
ID Photo Maker
Crop a photo to standard sizes (like 3.5×4.5), change the background color, and lay out a 4×6 print sheet
Image Annotator
An annotation tool for drawing arrows, boxes, numbers, and highlights on screenshots, then saving them
Image Cropper
Crop just the area you want by dragging, or lock to a fixed ratio like 1:1 or 16:9, then save
Image Splitter
Slice one image into an N×M grid and save each piece for an Instagram grid or puzzle tiles
Photo Filters & Effects
Apply preset filters like vintage, sepia, cool/warm, and vignette with one click, then save
Photo to Sketch
Convert photos into pencil sketch, colored pencil, or line drawing effects and save
Image Background Remover
Automatically remove photo backgrounds with in-browser AI for a transparent PNG
Image to Text (OCR)
Turn text in photos and screenshots into editable text

Image Converters 23

PNG to JPG Converter
Convert PNG to JPG, filling transparent backgrounds with white, adjust quality, and download
JPG to PNG Converter
Convert JPG to lossless PNG with no quality loss and download
JPG to WebP Converter
Convert JPG to lighter WebP, adjust quality, check the savings, and download
PNG to WebP Converter
Convert PNG to WebP while preserving transparency and greatly cutting file size
WebP to JPG Converter
Convert WebP to widely compatible JPG and fill transparent areas with a background color
WebP to PNG Converter
Convert WebP to lossless PNG with transparency preserved and download
Image to Base64
Convert an image to a Base64 Data URI and copy ready-made img and CSS snippets
Base64 to Image
Restore a Base64 or Data URI string back into an image to preview and download
Image to ASCII Art
Convert an image to ASCII art—adjust the character width and copy with one click
HEIC to WebP Converter
Convert iPhone HEIC photos to web-ready WebP
HEIC to JPG Converter
Convert iPhone HEIC/HEIF photos to universally openable JPG (with quality control)
HEIC to PNG Converter
Convert iPhone HEIC photos to lossless PNG
Favicon Generator
Turn one image into a 16/32/48/180px favicon PNG set plus the HTML tags, all at once
AVIF to JPG/PNG Converter
Convert next-gen AVIF images to universally supported JPG or PNG right in your browser
BMP ↔ JPG/PNG Converter
Shrink uncompressed BMP files to JPG or PNG, or convert images to 24-bit BMP
GIF to PNG Converter
Extract the first frame of an animated GIF as a still PNG or JPG image
ICO ↔ PNG Converter
Create a multi-size favicon.ico from a PNG, or extract an ICO to PNG
Image DPI Changer
Adjust the pixel dimensions and DPI (resolution) metadata for printing, then save
JFIF to JPG Converter
Turn Windows-saved .jfif images into standard JPG or PNG that open anywhere
JPG/PNG to AVIF Converter
Encode images to high-compression AVIF to speed up your web pages
SVG Optimizer
Shrink SVG size by removing comments, whitespace, and unneeded decimals
SVG to PNG/JPG Converter
Turn vector SVG into crisp PNG or JPG images at any scale
All-in-One Image Converter
Freely convert JPG, PNG, WebP, AVIF, and BMP to any format you want

PDF Tools 18

Delete PDF Pages
Remove unwanted pages from a PDF and save the rest as a new file
Extract PDF Pages
Pick just the pages you need and save them as a new PDF
Add Page Numbers to PDF
Automatically insert page numbers at the bottom of every page
PDF Watermark
Insert a diagonal text watermark across every page
Image to PDF Converter
Bundle multiple JPG/PNG images into a single PDF in the order you choose
PDF Metadata Editor (Title/Author)
View and edit PDF document properties (title, author, subject, keywords) and save again
Merge PDF
Arrange multiple PDF files in any order and combine them into one for download
Split PDF
Specify page ranges to extract from a PDF and download them as a new PDF
Rotate PDF
Rotate an entire PDF or selected pages by 90/180/270 degrees and save
Flatten PDF
Lock PDF form fields so the document can't be edited
HEIC to PDF Converter
Bundle multiple iPhone HEIC photos into a single PDF
PDF Bates Numbering
Stamp a prefix plus sequential Bates numbers on every PDF page at once
PDF Header & Footer
Add text, dates, and page numbers to the top and bottom of every page at once
PDF Page Organizer
Reorder pages and delete the ones you don't need, then save as a new PDF
PDF Page Resizer
Scale every page to a standard size like A4 or Letter in one pass
Sign PDF
Draw your signature and place it as an image on any page and position
PDF N-up (Pages per Sheet)
Place 2, 4, 6, or 9 pages on a single sheet to save paper when printing
Crop PDF (Trim Margins)
Trim top, bottom, left, and right margins in millimeters for a clean look

Video & Audio 15

Text & Developer 34

Word & Character Counter
Count characters (with/without spaces), words, sentences, paragraphs, and bytes in real time
Case Converter
Instantly convert to UPPER, lower, Title, camelCase, snake_case, and kebab-case
JSON Formatter & Validator
Pretty-print, minify, and validate JSON all in one place
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to plain text
URL Encoder & Decoder
Safely convert URL parameters with percent-encoding (%20, etc.)
Unix Timestamp Converter
Unix epoch ↔ date/time, with millisecond and time zone support
Slug Generator
Instantly turn titles and sentences into URL-friendly slugs
Find and Replace
Replace strings across multiline text all at once
Remove Duplicate Lines and Sort
Remove duplicates from a multiline list and sort it in any order
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal at once
HTML Entity Encoder / Decoder
Convert special characters to HTML entities, or back again
Text Compare (Diff)
Compare two texts line by line and highlight added, removed, and unchanged lines in color
JWT Decoder
Decode a JWT's header and payload and turn exp/iat into human-readable times
Regex Tester
Check match count, matches, and capture groups from a pattern, flags, and test string
Cron Expression Parser
Turn a 5-field cron expression into a plain-English description and parse it field by field
HTML Minifier & Beautifier
Strip needless whitespace and comments to minify your HTML, or re-indent it into clean, readable formatting
String Escaper
Escape quotes, backslashes, and newlines in JSON/JS strings, or turn them back into plain text
Unicode Escape Converter
Convert characters to \uXXXX, U+ code points, or HTML entities—and back again, freely
Morse Code Translator
Convert text to Morse code and back, and play the signal tones with Web Audio
Text ↔ Binary Converter
Convert text to UTF-8 binary or hex, and restore it back to the original text
CSS Unit Converter (px ↔ rem)
Convert px, rem, em, %, and pt back and forth all at once, based on the root font size.
Line Break Remover & Text Cleaner
Strip out forced line breaks and duplicate spaces pasted from PDFs and emails, tidying text into a single line or clean paragraphs.
XML Formatter
Pretty-print XML, minify it into a single line, and even check for well-formedness
YAML Validator & Formatter
Check YAML syntax, normalize it to a consistent form, and even convert to JSON
SQL Formatter
Uppercase SQL keywords and break each clause onto its own line for readable formatting
JS Minifier & Beautifier
Minify JavaScript to make it lighter, or beautify it into readable formatting
CSS Minifier & Beautifier
Minify CSS to cut file size, or beautify it with per-rule indentation for readability
JSONPath Query Tester
Apply path expressions like $.a.b[0] to JSON and extract exactly the values you want
URL Parser & Query String Converter
Break a URL into protocol, host, path, and query, and convert query strings to and from JSON
htpasswd Generator
Generate htpasswd lines for Apache/Nginx Basic Auth from a username and password (Web Crypto SHA)
JSON to TypeScript
Paste a JSON sample and auto-generate interface and type definitions
TOML ↔ JSON Converter
Convert simple TOML to JSON and JSON to TOML, in both directions
Text to Speech (TTS)
Read text aloud with your browser's built-in voices · adjust speed, pitch, and voice
Speech to Text (Dictation)
Transcribe microphone speech to text in real time · copy the result (Chrome recommended)

Calculators 40

Percentage Calculator
Three modes: 'what % of A', 'percent change', and 'what is X% of'
Korean Age Calculator
Calculate international age, Korean counting age, and the days until your next birthday
BMI Calculator
Calculate body mass index (BMI) and weight category from height and weight
Date Calculator (D-Day)
Days between two dates, or the date a set number of days before/after
Unit Converter
Convert length, weight, temperature, area, volume, speed, and data units
VAT Calculator
Add or separate 10% VAT to work out the supply price, total, and tax amount
Tip Calculator
Instantly work out the tip and per-person amount from the bill, tip rate, and party size
Loan EMI Calculator
Calculate the equal monthly payment, total interest, and total repayment from principal, annual rate, and term
Compound Interest Calculator
Calculate compound principal-and-interest and total interest from principal, rate, term, and monthly deposits
Hourly Wage Calculator
Estimate weekly and monthly pay from your hourly wage and weekly hours, with weekly holiday allowance included at 15+ hours
Time Duration Calculator
Add or subtract two HH:MM:SS values and get the result instantly
Aspect Ratio Calculator
Enter just one side of a target ratio like 16:9 and the other is calculated automatically
Roman Numeral Converter
Convert between Arabic and Roman numerals in the 1–3999 range
Fraction Calculator
Show the four arithmetic operations on two fractions as both a simplified fraction and a decimal
Mean & Standard Deviation Calculator
Get the mean, median, mode, variance, and standard deviation of a number list at once
Split Bill Calculator
Just enter the total and the number of people, and the per-person amount comes out even
Data Storage Converter
From bit to TB, convert at once using the 1000 or 1024 method
Discount Calculator
Get the discount amount and final price from list price and rate, or reverse-calculate the rate
Capital Gains Tax Calculator
Estimate real estate capital gains tax from purchase price, sale price, and holding period
Income Tax Calculator
Enter your taxable base to approximate the computed tax across the 6-45% progressive brackets
Annual Leave Calculator
Approximate your accrued paid leave days and leave pay based on your start date
Car Tax Calculator
Approximate passenger-car tax (rate per cc and vehicle-age reduction) from engine displacement and age
Fuel Cost Calculator
Calculate one-way and round-trip fuel cost and the fuel needed from distance, mileage, and fuel price
Sleep Calculator
Calculates bedtimes that let you wake up refreshed on 90-minute sleep cycles around your wake time.
Ideal Weight Calculator
Calculates your ideal weight, healthy weight range, and obesity level (%) from height and sex.
Body Fat Percentage Calculator
Approximates body fat percentage using the U.S. Navy circumference method or the BMI method.
Running Pace Calculator
Calculates pace per km, finish time, and predicted times by distance from your distance and goal time (or pace).
BMR & TDEE Calculator
Calculates basal metabolic rate (BMR) and daily calorie needs by activity level (TDEE) from sex, age, height, and weight.
Severance Pay Calculator
Estimate statutory severance pay from your start/end dates and 3-month average wage
Electricity Bill Calculator
Estimate residential electricity bills from monthly usage (kWh) using progressive tiers
Unemployment Benefit Calculator
Estimate your daily job-seeking benefit and total payout from average wage, age, and insured period
Savings Maturity Calculator
Calculate your installment savings maturity balance and after-tax payout from monthly deposit, rate, and term
GPA Calculator
Enter each course's credits and grade to compute your GPA on a 4.5/4.3/4.0 scale
Scientific Calculator
An expression calculator with trig, logs, exponents, parentheses, and roots, powered by a safe parser
Number to Korean Words Converter
Convert a numeric amount into Korean text like '일금 만원정'
Time Zone Converter
Accurately convert times between cities and time zones using the Intl API
Temperature Converter
Convert Celsius (°C), Fahrenheit (°F), and Kelvin (K) in real time on one screen
Pyeong to Square Meters Converter
Convert between pyeong and square meters in real time using the real-estate standard of 1 pyeong = 3.3058 ㎡
Due Date Calculator
From your last menstrual period, get your due date, gestational age, and ovulation and fertile window at once (for reference)
Net Salary Calculator
Estimate monthly take-home pay by approximating the four major insurance and income tax deductions from your gross annual salary (for reference)

Color & CSS 28

Color Code Converter (HEX/RGB/HSL)
Convert between HEX, RGB, HSL, and HSV with a live color preview
CSS Gradient Generator
Build linear and radial gradients visually and copy the CSS
CSS Box Shadow Generator
Adjust the shadow with sliders and copy the box-shadow code right away
CSS Border Radius Generator
Round each of the four corners and generate border-radius code instantly
Color Contrast Checker
Instantly check text readability and AA/AAA compliance with WCAG contrast ratios
CSS Filter Generator
Adjust blur, brightness, contrast, saturation and more with sliders to instantly generate CSS filter code
CSS Text Shadow Generator
Adjust offset, blur, and color to preview text-shadow and copy it as CSS
CSS Loading Spinner Generator
Pick a ring, dot, or pulse spinner, tune the color and speed, and copy pure CSS
SVG Wave Background Generator
Build a wavy SVG that smoothly connects sections—tune color, height, and curve, then copy
Mesh Gradient Background Generator
Layer multiple color points into an aurora-like mesh gradient and copy it as CSS
Color Palette Generator
Generate a harmonious 5-color palette at random—lock colors, reroll individually, copy HEX
Image Color Extractor
Extract a dominant color palette from an image—view and copy multiple HEX codes
Color Harmony Tool
Generate complementary, analogous, triadic, and tetradic schemes from a base color—show and copy HEX
Emoji Favicon Generator
Generate favicon PNGs in multiple sizes from an emoji or character—download plus HTML link tags
Glassmorphism Generator
Create frosted-glass CSS with blur, transparency, and border controls, with live preview and copy
Neumorphism (Soft UI) Generator
Generate convex, concave, and flat soft-UI CSS from a base color using dual shadows, with copy
CSS clip-path Generator
Create clip-path with polygon, circle, star, and other presets, with preview and CSS copy
Cubic Bezier Easing Generator
Build cubic-bezier easing from four control values, with motion preview and CSS copy
Flexbox Generator
Toggle justify, align, direction, and wrap with a live preview and copy the flex CSS
CSS Grid Generator
Set column and row counts and the gap to instantly generate grid-template CSS with a preview
SVG Background Pattern Generator
Adjust dots, grid, stripes, and other repeating backgrounds by color and size, output as SVG or CSS
SVG Blob Shape Generator
Adjust points and complexity to create random organic blob SVGs and copy the code
CSS Animation Generator
Preview fade, bounce, slide, and other keyframe animations while generating the CSS
Duotone Generator
Build a duotone gradient map from two colors, with CSS and image preview
Tailwind Color Converter
Match any HEX to the closest Tailwind color class, and convert a class back to HEX instantly
Color Blindness Simulator
Compare side by side how a chosen color looks to people with red-green or blue-yellow color vision deficiency
Color Picker
Pick a color to see HEX, RGB, HSL, and HSV in real time, with an on-screen eyedropper too
Color Name Finder
Enter a HEX or RGB value to find the closest CSS color name

Generators 29

UUID Generator
Instantly generate one or many random UUID v4 values
Lorem Ipsum Generator
Generate placeholder text by the paragraph, sentence, or word for design and mockups
Hash Generator (SHA-256/512)
Convert text to SHA-1, SHA-256, SHA-384, or SHA-512 hashes
Password Generator
Create strong random passwords by choosing length and character types
.gitignore Generator
Build a .gitignore tailored to your project in just a few clicks
Random Number Picker
Draw random numbers from a range with no repeats, or fairly pick winners from a name list
Username & Nickname Generator
A random username and nickname generator from adjective + noun + number
Placeholder Image Generator
A generator for placeholder images with custom size, color, and label for mockups
Signature Pad
A signature pad that saves signatures drawn with mouse or touch as a transparent PNG
Meta & Open Graph Tag Generator
Enter a title, description, image, and URL to get SEO meta, Open Graph, and Twitter Card tags
robots.txt Generator
Add per-user-agent allow/block rules and your sitemap location to generate robots.txt instantly
JSON-LD Schema Generator
Generate schema.org JSON-LD markup from simple Article, Product, FAQ, and LocalBusiness form inputs
Sitemap (XML) Generator
Paste a URL list to generate and download a sitemap.xml with priority, changefreq, and lastmod
.htaccess Generator
Pick rules from a form — force HTTPS, unify www, 301 redirects, and more — to generate an .htaccess
Fake Data Generator
Generate as many fake records — names, emails, phones, addresses — as you want and export to JSON or CSV
Random Team Generator
Shuffle a list of names at random and split them fairly into evenly sized teams
Passphrase Generator
Combine several words into an easy-to-remember yet strong passphrase using cryptographic randomness
QR Code Generator
Turn URLs, text, phone numbers, and emails into colored QR codes and save as PNG
WiFi QR Code Generator
Create a WiFi QR from your SSID, password, and encryption type that connects the instant it's scanned
vCard (Contact) QR Generator
Turn a name, phone, email, and company into a vCard QR to save as a digital business card
URL (Link) QR Generator
Turn a website or profile URL into a clean colored QR and download it
Barcode Generator
Pick a format like CODE128, EAN-13, or UPC and instantly generate and download barcodes for products and inventory
Business Card Maker
Enter your name, title, company, and contact details to instantly create and download a business card image
Cron Expression Generator
Pick minute, hour, day, month, and weekday to generate a cron expression with a plain-English description
Email Signature (HTML) Generator
Create and copy an HTML email signature for Gmail and Outlook from your name, title, company, contacts, and social links
Invoice & Quote Generator
Enter line items, quantities, unit prices, and tax to preview an invoice or quote and save it as PDF or print
Privacy Policy Generator
Enter your site or app details to generate a privacy policy and terms-of-service draft (for AdSense approval and app review)
GitHub README Generator
Enter your project name, install steps, and license to generate, copy, and download a GitHub README.md
Resume Builder
Enter your personal details, education, and work history to preview a resume and save it as PDF or print

Data & Documents 21

CSV to JSON Converter
Paste CSV and convert it to a JSON array (delimiter and header options, copy the result)
JSON to CSV Converter
Turn JSON array keys into CSV headers, then copy or download
Markdown Table Generator
Set rows, columns, and alignment to generate Markdown table syntax instantly
Table Paste to Markdown
Instantly convert tables copied from Excel or Google Sheets into Markdown or HTML tables
vCard Generator
Enter a name, phone, email, and company to create a standard digital business card (.vcf) and download it instantly
ICS Calendar Generator
Create a calendar .ics event from a title, date/time, and location, and add it straight to Google Calendar
JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON both ways (basic structures supported).
JSON ↔ XML Converter
Convert JSON and XML both ways (basic structures, attributes, and repeated elements supported).
CSV to SQL Generator
Convert CSV into CREATE TABLE and INSERT statements (choose the table name and DB dialect).
Excel (XLSX) to JSON Converter
Instantly convert Excel/spreadsheet sheets into a JSON array to copy or download
Excel (XLSX) to CSV Converter
Convert Excel sheets to CSV and download (choose delimiter, prevent garbled characters)
JSON to Excel (XLSX) Converter
Convert a JSON array into an .xlsx Excel file and download it (set sheet and file name)
Markdown to HTML Converter
Convert Markdown to HTML with a live preview
HTML to Markdown Converter
Convert messy HTML into clean Markdown and copy it
CSV to Excel (XLSX) Converter
Convert CSV into a real .xlsx Excel file and download it
CSV Duplicate Row Remover
Clean up duplicates in a CSV by whole row or by specific columns, all at once
Calendar CSV ↔ ICS Converter
Convert a schedule CSV into a multi-event .ics, and .ics back into CSV, both ways
Contacts CSV ↔ vCard Converter
Convert a contacts CSV into a .vcf bundle, and .vcf back into CSV, both ways
CSV Column Editor
Select, reorder, rename, and trim whitespace in CSV columns, then save back to CSV
Excel/CSV Merger
Combine multiple Excel and CSV files into a single workbook
Excel Sheet Splitter
Split each Excel sheet into a separate Excel or CSV file

Social Media 16

Twitter Thread Splitter
Automatically split long text into tweets under 280 characters, complete with 1/n numbering
X (Twitter) Character Counter
A real-time 280-character counter for X (Twitter) that applies the 23-char URL and 2x CJK weighting rules
Social Caption & Hashtag Counter
Count caption characters and hashtags, and spot Instagram, X, TikTok, Threads, and YouTube limit overages at a glance
Fancy Text Generator for Instagram
Convert plain text into bold, italic, cursive, and other Unicode fonts for bios and usernames
Hashtag Generator
Turn keywords and a category into a related hashtag set on a single line
Instagram Line Break Formatter
Keep Instagram's vanishing line breaks and blank lines intact with invisible characters
Profile Picture Cropper
Crop an image into a square or circular profile, preview it, and save as PNG
Engagement Rate Calculator
Calculate social media engagement rate (%) and an engagement grade from followers, likes, and comments
YouTube Revenue Calculator
Simulate estimated ad revenue by day, month, and year from views and RPM (for reference)
Open Graph & Twitter Card Generator
Build og/twitter meta tags from a title, description, image, and URL, and preview the share card
Instagram Grid Planner
Arrange multiple photos in a 3-column grid to preview your feed's order and mood before posting
Instagram Carousel Splitter
Split wide or panoramic images into 2–10 seamless square slides
Social Image Resizer
Crop and resize to platform specs—Instagram, YouTube thumbnails, Facebook covers, and more
Tier List Maker
Arrange items or images into S–F tiers and save your tier chart as an image (great for memes)
Emoji Search & Copy
Find emoji by category or search and copy with one click; remembers recent use
Social Profile QR Generator
Turn Instagram, TikTok, and YouTube profiles into branded color QR codes

Web & SEO 17

UTM Campaign URL Builder
Instantly build and copy trackable campaign links from a base URL and UTM parameters
Keyword Density Analyzer
See word frequency and density (%) ranked in a table, plus the total word count
Online Notepad
An install-free notepad that auto-saves in your browser, with character count, TXT export, and clear all
Timer & Stopwatch
A countdown timer and stopwatch in one place, with an alarm sound when time's up
Meta Tag Preview
Enter a title and description to get a Google search result preview plus meta tag code at once
Google SERP Snippet Preview
Enter a title, URL, and description to preview desktop and mobile snippets and truncation
Readability Score Analyzer
Calculate a quick readability score from sentence count, average sentence length, and word count
My Browser Info Checker
See your User-Agent, OS, screen resolution, language, and cookie support at a glance
Dice, Coin & Random Picker
Roll dice, flip coins, and draw random numbers within a range — all in one place
Password Strength Checker
Instantly analyze password entropy and estimated crack time locally (nothing is sent)
EXIF Metadata Viewer
View a photo's camera, capture date/time, GPS location, and other EXIF data locally in your browser
File Hash (Checksum) Generator
Compute SHA-256/512 checksums of files or text right in your browser to verify integrity
Text Encryption (AES)
Encrypt and decrypt text with AES-GCM 256-bit using a password—entirely inside your browser
Random Wheel Spinner
Add names or items, spin the wheel, and pick a winner fairly
Typing Speed Test (WPM)
Type the given sentence to measure WPM, CPM, and accuracy in real time
QR Code Scanner
Read QR codes from an uploaded image or your camera and see the contents instantly
What Is My IP
Look up your public IP, approximate location, and ISP via free APIs, plus browser info (UA, resolution) at a glance
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