Developer tools
that just work.
Format JSON, decode Base64, test regex, compress images and more. No signups, no uploads, no waiting — everything runs right in your browser.
Popular tools
All 41 tools →JSON Formatter
Format, validate, and beautify JSON online. 100% client-side — your data never leaves your browser.
Lorem Ipsum Generator
Generate placeholder text — words, sentences, or paragraphs. Classic lorem ipsum plus alternatives (hipster, cupcake, pirate). HTML-wrapped output option.
Word Counter
Count words, characters, sentences, paragraphs, and lines. Reading time estimate, char-limit indicators for X, LinkedIn, meta titles, and more.
Base64 Encoder / Decoder
Encode and decode Base64 strings and files. Client-side, safe for sensitive data.
Regex Tester
Test regular expressions with live match highlighting and explanation.
QR Code Generator
Generate QR codes for URLs, text, Wi-Fi, contact cards. Custom size, colors, error correction. Download as PNG or SVG. 100% client-side.
Password Generator
Generate strong random passwords with configurable length, character classes, and exclusions. Real entropy meter, crack-time estimate, bulk mode.
Image Compressor
Compress JPEG, PNG, and WebP images in your browser. Adjustable quality, batch mode. Files never leave your device.
Recently added
HTML Viewer & Formatter
Paste HTML and see it rendered live in a sandboxed preview. Format and beautify messy markup, inline CSS and JS. Desktop, tablet and mobile widths.
Binary to Text Converter
Translate binary to text and text to binary, hex, decimal or octal — both ways, live. Full UTF-8 and emoji support with a per-character table.
SVG to PNG Converter
Convert SVG to PNG, JPEG or WebP at any size — 1× to 8× or exact pixels. Transparent or solid background. Batch files, all in your browser.
Number to Words Converter
Spell out any number in English words — plain, currency, check-writing (“and 56/100”) and ordinal. Up to 66 digits, decimals and negatives.
Every tool, by category
All 41 tools on one screen. Or press / to search.
Data & Format 11
JSON, XML, YAML, CSV, SQL, HTML and Markdown — format, view, convert and diff.
Encoding & Crypto 10
Base64, URL, JWT, hashes, UUID, binary, QR codes and passwords.
Dev Productivity 13
Regex, cron, timestamps, word counter, case converter, lorem ipsum, subnets and more.
Frontend & Design 7
CSS generators, image compression, SVG to PNG, favicons and px to rem.
Latest guides
All guides →AVIF Image Format — Better Compression Than WebP and JPEG
AVIF offers 50% smaller files than JPEG at equivalent quality. Learn browser support, how to convert images to AVIF with sharp and ffmpeg, and how to serve AVIF with WebP and...
AWS EventBridge Scheduler — Cron Schedules for Lambda and AWS Services
AWS EventBridge Scheduler runs Lambda functions, ECS tasks, and other AWS targets on a cron or rate schedule. Learn how to create schedules with cron expressions, handle...
Base64 PDF Embedding — Inline PDFs in HTML, JSON APIs, and Email
Embed PDF files as Base64 strings in HTML data URIs, JSON API responses, and email attachments. Learn when Base64 embedding makes sense, the size overhead, and alternatives...
Base64 vs Hex Encoding — When to Use Each
Compare Base64 and hex encoding for binary data. Learn which is more compact, when to use each in APIs, cryptography, and storage, with JavaScript and Python examples.
bcrypt Password Hashing — Why You Should Use bcrypt and How to Implement It
bcrypt is the standard password hashing algorithm for web applications. Learn why MD5 and SHA-256 are wrong for passwords, how bcrypt's work factor prevents brute-force...
Binary Arithmetic — Addition, Subtraction, and Two's Complement
Learn how computers perform binary arithmetic: binary addition with carry, two's complement for negative numbers, overflow detection, and how CPUs handle integer operations in...
Why Xerobit?
Every tool runs 100% in your browser. Your data never touches our servers — paste production JSON or tokens without worry.
No server round-trips and no loading spinners. Results update as you type.
Every tool is built and maintained by a working engineer who uses it daily.