Developer tools
Everyday helpers for developers. Everything runs locally in your browser, so you can paste real data safely.
JSON Formatter
Paste JSON to format it with clean indentation, check that it is valid, minify it or sort…
Password Generator
Create strong, random passwords in one click. Choose the length and character types, skip…
Regex Tester
Type a regular expression and some text to see every match highlighted, with capture…
UUID Generator
Generate random UUID v4 or time-ordered UUID v7 identifiers — one or up to 500 at a time…
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text — with emoji and accents handled…
Unix Timestamp Converter
See the current Unix timestamp, convert any timestamp to a readable date in UTC and your…
HEX to RGB Converter
Paste a HEX, RGB or HSL colour — or pick one — and get every format at once, with a live…
URL Encode / Decode
Convert text into a safe URL format with percent encoding, decode encoded links back into…
Hash Generator
Create MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text or file, and check a…
Lorem Ipsum Generator
Create filler text for layouts, mockups and templates. Choose paragraphs, sentences or…
JWT Decoder
Paste a JSON Web Token to see its header and payload as formatted JSON, check its issue…
JSON to CSV Converter
Turn JSON data from an API or export into a CSV file you can open in Excel or Google…
SQL Formatter
Paste a one-line or messy SQL query and get it back neatly formatted — clauses on their…
Markdown to HTML Converter
Write or paste Markdown and see it rendered instantly, then copy the clean HTML for your…
Color Palette Generator
Build a harmonious set of five colours from one base colour or at random. Lock the ones…
CSV to JSON Converter
Turn CSV exports from Excel, Google Sheets or databases into clean JSON. The converter…
Image to Base64 Converter
Encode images as Base64 to embed them directly in HTML, CSS, JSON or emails — or paste…
Color Contrast Checker
Make sure your text is readable for everyone. Enter a text and background colour to get…
CSS Box Shadow Generator
Design soft, sharp, layered or inner shadows with sliders and a live preview, then copy…
PX to REM Converter
Turn pixel values into rem for responsive, accessible CSS — or rem back into pixels. Set…
CSS Gradient Generator
Build beautiful gradient backgrounds in seconds. Choose linear, radial or conic, pick up…
HTML Minifier
Make your HTML smaller and faster to load. Remove comments and unnecessary whitespace…
CSS Minifier & Beautifier
Shrink your stylesheets or make minified CSS readable again. The minifier removes…
Glassmorphism Generator
Design frosted-glass cards and panels with a live preview. Tune blur, transparency…
Border Radius Generator
Round the corners of any element visually. Control every corner in pixels or percent, use…
Guides
What Is SHA-256 Hash Used For? A Simple Guide
Learn what is SHA-256 hash used for — passwords, downloads, and blockchains — with a real example and a free hash generator.
November 8, 2026What Is Unix Timestamp? A Simple Guide
What is Unix timestamp? Learn what those 10-digit numbers mean, how to read them, and how to convert any timestamp to a date.
November 7, 2026What Is URL Encoding %20? Why It Appears in Links
Wondering what is url encoding %20? Learn why spaces become %20 in links, which characters must be encoded, and how to fix messy…
November 4, 2026What Is UUID Used For? Random IDs Explained
What is UUID used for? Learn where these random IDs appear, why databases rely on them, and how UUID v4 works — plus a free…
November 2, 2026How to Test Regex Online: A Practical Beginner's Guide
Learn how to test regex online with live examples: email and date patterns, greedy-match fixes, and a free tester that highlights…
November 1, 2026How to Read JSON API Response: Format Messy Data in Seconds
Learn how to read JSON API response data fast: format raw output, spot missing brackets, validate it before shipping, and fix…
October 29, 2026What Is Base64 Encoding Used For? A Simple Guide
Learn what base64 encoding is used for, how it turns binary data into safe text for emails and APIs, and why it is not encryption.
October 25, 2026What Is Lorem Ipsum Used For? A Designer's Guide
Wondering what is lorem ipsum used for? Learn its origins, when to use placeholder text in design, better alternatives, and how…
October 24, 2026Markdown to HTML Cheat Sheet: Beginner's Guide
This markdown to html cheat sheet shows the essential Markdown syntax with examples, plus a free converter to turn your Markdown…
October 22, 2026Why Format SQL Queries? Clean SQL Saves Debugging Hours
Discover why format sql queries matters for debugging, reviews, and teamwork. See a real before-and-after example and learn how…
October 18, 2026Gallons to Liters Conversion: US vs UK Gallon Guide
Get the gallons to liters conversion right: exact US (3.78541 L) and UK (4.54609 L) factors, a quick reference table, and…
October 17, 2026How to Create a Strong Password You'll Remember
Learn how to create a strong password that's both secure and memorable. Use passphrases, avoid reuse, and generate secure…
October 17, 2026