Free Online Developer Tools
Powerful utilities for developers — all client-side, all free. No sign-up, no ads that block your workflow.
Password Generator
Generate strong, random passwords with customizable length and character sets.
SecurityUnix Timestamp Converter
Convert epoch time to human-readable dates and back, instantly.
ConverterHTML Encoder / Decoder
Escape or unescape HTML entities safely for display or storage.
EncodingNumber Base Converter
Convert between decimal, binary, hexadecimal, and octal instantly.
ConverterText Counter
Count characters, words, lines, sentences, and reading time live.
UtilitySlug Generator
Turn any title or text into a clean, SEO-friendly URL slug.
UtilityPopular Tools
JSON Formatter
Format, validate, minify, and tree-view JSON data. Handles large files with syntax highlighting.
FormattingText Diff Checker
Compare two text blocks side-by-side. See additions, deletions, and changes instantly highlighted.
CompareUUID Generator
Generate UUID v4, v1, and bulk UUIDs. Copy individual or all at once with one click.
GeneratorBase64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text. Supports UTF-8 and binary safely.
EncodingURL Encoder / Decoder
URL-encode or decode text for safe query strings. Handles special characters and emoji.
EncodingRegex Tester
Test regular expressions in real-time. See matches, groups, and replace. Supports flags.
TextJWT Decoder
Decode and inspect JWT tokens. View header, payload, and signature. Detects expiry.
SecurityMarkdown Preview
Write Markdown and see the rendered HTML live. Supports tables, code blocks, and GitHub-flavored MD.
EditorColor Converter
Convert between HEX, RGB, HSL, and OKLCH. Pick colors visually with an interactive color picker.
ConverterLorem Ipsum Generator
Generate placeholder text. Choose paragraphs, sentences, or words. Classic and modern variants.
GeneratorSQL Formatter
Format SQL queries with indentation. Beautify SELECT, INSERT, JOIN, and nested queries.
FormattingHash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes. Compare checksums and verify file integrity.
SecurityClient-Side Processing
All tools run entirely in your browser. Your data never leaves your device — we don't upload or store anything.
Lightning Fast
No server round-trips. Instant results for formatting, encoding, generating, and diffing content.
No Sign-Up
All tools are free and accessible immediately. No registration, no subscription, no limits.