JSON formatter
Make JSON readable, validate its structure, or keep it compact.
Code & data
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{ } JSON formatter↗
Processed locally
A little tool for every task.
32 useful toolsCSV ↔ JSON
Move between rows and structured data, with quoting handled.
Code & data
SQL formatter
Bring order to your queries, in the dialect you actually use.
Code & data
Base64 encoder / decoder
Encode and decode UTF-8 text without losing its characters.
Text & encoding
URL encoder / decoder
Escape a URL component or a complete URI, explicitly.
Text & encoding
HTML entity converter
Escape reserved characters or decode HTML entities safely.
Text & encoding
Text difference checker
Find the lines that changed between two pieces of text.
Text & encoding
Word & character counter
A quick count of words, characters, lines and whitespace.
Text & encoding
Text case converter
Switch text to sentence, title, upper, lower or code-friendly case.
Text & encoding
UUID generator
Generate random version 4 UUIDs using browser cryptography.
Code & data
Unix timestamp converter
Translate seconds, milliseconds and UTC dates without guessing.
Time & numbers
Percentage calculator
Find a percentage, a share, or the change between values.
Time & numbers
XML formatter & validator
Validate XML structure and give nested elements room to breathe.
Code & data
HTML formatter
Make markup easier to read without rendering or running it.
Code & data
CSS formatter & minifier
Tidy a stylesheet or remove unnecessary bytes.
Code & data
JavaScript formatter
Format or minify JavaScript while keeping it entirely inert.
Code & data
Regular expression tester
Test a JavaScript pattern and inspect its matches safely.
Code & data
SHA hash generator
Create a SHA-256 or SHA-512 fingerprint of UTF-8 text.
Code & data
Number base converter
Convert whole numbers between binary, octal, decimal and hex.
Time & numbers
Data-size converter
Keep decimal megabytes and binary mebibytes distinct.
Time & numbers
Unit converter
Convert length, mass, area, volume and temperature.
Time & numbers
Date difference calculator
Count calendar days with an explicit start-and-end convention.
Time & numbers
Time-zone converter
Convert local times across IANA zones, including daylight saving.
Time & numbers
Line tools
Sort, trim and remove duplicate or empty lines.
Text & encoding
Image resizer
Give an image the right dimensions, with its proportions intact.
Image & design
Image compressor
Try a smaller image and compare the actual file sizes.
Image & design
Image format converter
Convert between PNG, JPEG and WebP in your browser.
Image & design
Favicon generator
Create square PNG favicons or a correctly encoded ICO file.
Image & design
Colour converter & picker
Move between HEX, RGB and HSL with a live colour swatch.
Image & design
Colour contrast checker
Check text contrast against WCAG AA and AAA thresholds.
Image & design
QR-code generator
Turn text or a link into a locally generated, downloadable QR.
Image & design
Discount calculator
See your savings and the final price after a discount.
Time & numbers
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Turn CSV into JSON, format it, then copy or download. Keep each step in one ad-free workbench.
A FEW USEFUL SHORTCUTS
From task to done.
01Code & data
From a spreadsheet to API-ready JSON
Clean up CSV, inspect the JSON, and encode it only when the next system needs it.
Read the guide ↗02Text & encodingMake a piece of text ready for the web
Count it, check the changes, then escape it for the right context.
Read the guide ↗03Image & designTurn a colour idea into readable text
Convert a brand colour, check contrast, and adjust with a purpose.
Read the guide ↗