Free browser-based developer tools. All tools run 100% client-side. your data never leaves your browser. No signup required.
JSON Validator & Formatter
Validate JSON online with detailed error messages showing line and column numbers. Format and beautify JSON data instantly.
YAML Validator & Formatter
Validate YAML online with detailed error messages. Format YAML and convert to JSON instantly. Perfect for Kubernetes, Docker Compose, and CI/CD configs.
TOML Validator & Formatter
Validate TOML online with detailed error messages. Format TOML and convert to JSON instantly. Perfect for Cargo.toml, pyproject.toml, and config files.
Regex Tester & Debugger
Test regular expressions with real-time highlighting, pattern explanation, capture groups, and find-replace. Supports all JavaScript regex flags.
Cron Expression Generator
Parse, validate, and build cron job expressions visually. Translate cron expressions to plain English and see next scheduled run times.
Quartz Scheduler Cron
Parse, validate, and build Quartz Scheduler cron expressions (6-7 fields). Supports ?, L, W, # syntax. Compatible with Java Quartz and Spring Boot.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8 characters including emojis and special characters.
JWT Decoder & Inspector
Decode JWT tokens instantly. Inspect header, payload, and signature with color-coded visualization. Check expiration and view claims.
Snowflake ID Decoder
Decode Discord, Twitter, and Instagram IDs to timestamps. Visualize the 64-bit structure and generate sample Snowflake IDs.
UUID Generator & Decoder
Generate UUID v4 (random) and UUID v7 (timestamp-based). Bulk generate, decode versions, extract timestamps, and validate format.
Epoch Timestamp Converter
Convert Unix timestamps to human-readable dates and dates to Unix timestamps. Supports seconds, milliseconds, and multiple formats.
SLA Uptime Calculator
Calculate allowed downtime for any SLA percentage. Convert 99.9% uptime to actual downtime per day, month, and year. Understand the "nines" in practice.
URL Encoder & Decoder
Encode text for URLs using percent encoding or decode URL-encoded strings back to readable text. Supports encodeURIComponent and encodeURI.
SQL Formatter & Beautifier
Format and beautify SQL queries with proper indentation, keyword capitalization, and syntax highlighting. Supports MySQL, PostgreSQL, SQL Server, and Oracle.
QR Code Generator
Create custom QR codes for URLs, text, email, phone numbers, WiFi networks, and more. Customize colors, size, and error correction. Download as PNG or SVG.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text instantly. Create paragraphs, sentences, or words of dummy text for web design, mockups, and development. One-click copy.
More Tools Coming Soon
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