32 developer tools that respect your time

Format, encode, decode, hash, and generate — all in your browser. Fast, private, free.

JSON Formatter

Popular

Format, 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

New

Generate strong random passwords. Customize length, characters, symbols. Crypto-secure.

Word Counter

Count words, characters, sentences. Reading time, word frequency analysis.

Cron Expression Generator

New

Build, 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

New

Write and preview Markdown in real-time. GFM, tables, code blocks. Export to HTML.

HTML Entity Encoder

New

Encode & decode HTML entities. Named, numeric, hex formats. Entity reference table.

CSS Minifier & Beautifier

New

Minify 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

New

Convert JSON to TypeScript interfaces and types. Nested objects, arrays, optional fields.

Chmod Calculator

New

Interactive Linux permission calculator. Octal ↔ symbolic, common presets, chmod commands.

Number Base Converter

New

Convert between binary, octal, decimal, and hexadecimal. BigInt support, bit info.

Image to Base64

New

Encode images to Base64 data URIs. Decode Base64 back to images. HTML & CSS snippets.

Binary to Text

New

Convert between text and binary, hex, octal, decimal. ASCII reference table included.

QR Code Generator

New

Create QR codes for text, URLs, email, WiFi, phone. Custom colors. Download PNG/SVG.

CSS Gradient Generator

New

Create beautiful linear, radial, and conic CSS gradients. Copy CSS or Tailwind code.

JSON Validator

New

Validate JSON, find errors with line numbers, and analyze structure in real-time.

JSON to CSV

New

Convert JSON arrays to CSV format. Custom delimiters, download as .csv file.

Text Case Converter

New

Convert between 13 text cases: UPPER, lower, Title, camelCase, snake_case, kebab-case, and more.

HTML to Markdown

New

Convert HTML to clean Markdown. Headings, links, images, tables, code blocks.

SVG to PNG

New

Convert 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

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