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.

Validator Formatter Error Location

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.

Validator Formatter YAML → JSON

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.

Validator Formatter TOML → JSON

Regex Tester & Debugger

Test regular expressions with real-time highlighting, pattern explanation, capture groups, and find-replace. Supports all JavaScript regex flags.

Real-time Highlighting Explainer

Cron Expression Generator

Parse, validate, and build cron job expressions visually. Translate cron expressions to plain English and see next scheduled run times.

Translator Builder Scheduler

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.

Translator Builder Quartz/Spring

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8 characters including emojis and special characters.

Encoder Decoder UTF-8

JWT Decoder & Inspector

Decode JWT tokens instantly. Inspect header, payload, and signature with color-coded visualization. Check expiration and view claims.

Decoder Expiration Claims

Snowflake ID Decoder

Decode Discord, Twitter, and Instagram IDs to timestamps. Visualize the 64-bit structure and generate sample Snowflake IDs.

Discord Twitter Timestamp

UUID Generator & Decoder

Generate UUID v4 (random) and UUID v7 (timestamp-based). Bulk generate, decode versions, extract timestamps, and validate format.

v4 Random v7 Timestamp Bulk

Epoch Timestamp Converter

Convert Unix timestamps to human-readable dates and dates to Unix timestamps. Supports seconds, milliseconds, and multiple formats.

Date Timestamp Timezone

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.

Nines Downtime Reference

URL Encoder & Decoder

Encode text for URLs using percent encoding or decode URL-encoded strings back to readable text. Supports encodeURIComponent and encodeURI.

Encode Decode Percent

SQL Formatter & Beautifier

Format and beautify SQL queries with proper indentation, keyword capitalization, and syntax highlighting. Supports MySQL, PostgreSQL, SQL Server, and Oracle.

Formatter Minifier Highlighting

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.

URL/Text/Email WiFi Customizable

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.

Paragraphs Sentences HTML Tags

More Tools Coming Soon

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