Developer Utilities
DEV TOOLS
23 essential utilities that run entirely in your browser — no installs, no external APIs, no telemetry. All tools work 100% locally with instant results.
All Developer Tools
Browse our complete collection of 23 free, open-source developer utilities. Each tool processes your data locally in the browser — no server uploads, no tracking, complete privacy.
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23 tools
Base64
Encoder / Decoder
Encode strings & files to Base64 or decode Base64 back to plain text instantly.
ID Generator
UUID · ULID · NanoID
Generate UUIDs v4/v7, ULIDs, and NanoIDs. Bulk generation with one click.
JSON Tools
Format · Validate · Diff
Pretty-print JSON, validate syntax, minify, and compare two JSON documents side by side.
Minify / Beautify
HTML · CSS · JS
Minify HTML, CSS, and JavaScript for production or beautify minified code for reading.
JWT Decoder
Inspect & Verify
Decode JWT tokens, inspect header/payload, check expiry and structure at a glance.
URL Tools
Encode · Decode · Parse
URL-encode/decode strings, parse query parameters, and build query strings visually.
Hash Generator
MD5 · SHA-256 · SHA-512
Generate cryptographic hashes from any string. Compare hashes to verify integrity.
Timestamp
Unix ↔ Human Date
Convert Unix timestamps to readable dates and back. Supports milliseconds and UTC offsets.
Regex Tester
Live Match & Explain
Test regular expressions live, see match groups highlighted, and explore flags interactively.
Color Converter
HEX · RGB · HSL · CSS
Convert between color formats, pick colors visually, and copy CSS-ready values instantly.
Case Converter
camelCase · snake_case · kebab-case
Convert strings between camelCase, snake_case, kebab-case, PascalCase, and more formats.
Markdown Preview
Live Preview & Editor
Write Markdown and preview the rendered HTML instantly. Perfect for documentation.
CSV to JSON
Convert & Format
Convert CSV data to JSON format instantly. Supports headers, custom delimiters, and bulk processing.
Password Generator
Secure & Customizable
Generate strong, random passwords with customizable length and character sets. Copy with one click.
QR Code
Generator & Reader
Generate QR codes from any text or URL. Download as PNG. Fast and reliable.
Diff Viewer
Text Comparison
Compare two texts side-by-side with line-by-line highlighting. Perfect for comparing code, configs, or documents.
Lorem Ipsum
Placeholder Generator
Generate placeholder text in various styles (Lorem, Bacon, Hipster, Corporate). Perfect for mockups and testing.
Cron Expression
Builder & Tester
Build and test cron expressions visually. Get human-readable explanations and preview execution schedules.
SQL Formatter
Format & Minify
Format SQL queries for readability or minify them for production. Supports common SQL dialects.
HTML Entities
Encode / Decode
Encode special characters to HTML entities or decode them back. Essential for safe HTML display.
Text Transform
Slug · Case Converter
Transform text between different formats: URL slugs, camelCase, snake_case, kebab-case, and more.
Image to Base64
Convert & Embed
Convert images to Base64 encoding. Perfect for embedding images in HTML, CSS, or JSON.
YAML ↔ JSON
Converter
Convert between YAML and JSON formats. Perfect for config files, Kubernetes manifests, and CI/CD pipelines.