32 developer tools that respect your time
Format, encode, decode, hash, and generate — all in your browser. Fast, private, free.
JSON Formatter
PopularFormat, validate, and minify JSON. Syntax highlighting and error detection.
Base64 Encode/Decode
Encode text to Base64 or decode Base64 back to text. Supports UTF-8.
URL Encode/Decode
Encode special characters for URLs or decode percent-encoded strings.
JWT Decoder
Decode JWT tokens. View header, payload, and verify expiration.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text.
UUID Generator
Generate random UUIDs (v4). Bulk generate and copy with one click.
Timestamp Converter
Convert Unix timestamps to human dates and vice versa. Live clock.
Regex Tester
Test regular expressions against text. Real-time match highlighting.
Text Diff
Compare two texts side by side. Highlight additions and deletions.
Lorem Ipsum
Generate placeholder text. Paragraphs, sentences, or words.
Color Converter
Convert colors between HEX, RGB, HSL, and HSV. WCAG contrast checker.
Tailwind Colors
Full Tailwind CSS palette with live component previews. Pick, preview, copy.
Password Generator
NewGenerate strong random passwords. Customize length, characters, symbols. Crypto-secure.
Word Counter
Count words, characters, sentences. Reading time, word frequency analysis.
Cron Expression Generator
NewBuild, parse, and explain cron schedules. See next execution times. Crontab guru alternative.
YAML ↔ JSON Converter
Convert between YAML and JSON instantly. Supports Kubernetes, Docker Compose, GitHub Actions.
Markdown Preview
NewWrite and preview Markdown in real-time. GFM, tables, code blocks. Export to HTML.
HTML Entity Encoder
NewEncode & decode HTML entities. Named, numeric, hex formats. Entity reference table.
CSS Minifier & Beautifier
NewMinify CSS for production or beautify for readability. Shows size savings and stats.
SQL Formatter
Format messy SQL into clean, readable queries. Configurable indent, casing, comma style.
JSON to TypeScript
NewConvert JSON to TypeScript interfaces and types. Nested objects, arrays, optional fields.
Chmod Calculator
NewInteractive Linux permission calculator. Octal ↔ symbolic, common presets, chmod commands.
Number Base Converter
NewConvert between binary, octal, decimal, and hexadecimal. BigInt support, bit info.
Image to Base64
NewEncode images to Base64 data URIs. Decode Base64 back to images. HTML & CSS snippets.
Binary to Text
NewConvert between text and binary, hex, octal, decimal. ASCII reference table included.
QR Code Generator
NewCreate QR codes for text, URLs, email, WiFi, phone. Custom colors. Download PNG/SVG.
CSS Gradient Generator
NewCreate beautiful linear, radial, and conic CSS gradients. Copy CSS or Tailwind code.
JSON Validator
NewValidate JSON, find errors with line numbers, and analyze structure in real-time.
JSON to CSV
NewConvert JSON arrays to CSV format. Custom delimiters, download as .csv file.
Text Case Converter
NewConvert between 13 text cases: UPPER, lower, Title, camelCase, snake_case, kebab-case, and more.
HTML to Markdown
NewConvert HTML to clean Markdown. Headings, links, images, tables, code blocks.
SVG to PNG
NewConvert SVG to high-quality PNG. Custom scale (1x–4x), transparent background.
Why DevTools
Instant
All tools run in your browser. No server round-trips.
Private
Your data never leaves your device. Zero tracking.
Free
No signup, no limits. Every tool is free to use.
Any device
Works on desktop, tablet, and mobile. No install.
Frequently Asked Questions
Everything you need to know about DevTools