Dev Tools
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100% Client-side. No tracking.

The developer toolkit
you can trust.

A privacy-first collection of essential tools. running entirely in your browser.
No servers, no tracking, just utility.

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Converters

8
Casing

String Case Converter

Convert text between camelCase, snake_case, kebab-case, PascalCase, and more.

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Data

CSV to JSON Converter

Convert CSV data into JSON arrays or objects with automatic header detection.

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Config

YAML to JSON Converter

Convert YAML configuration files to JSON and vice-versa for easy validation.

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LLM

JSON to TOON Converter

Convert JSON to TOON outline notation to save tokens in LLM prompts.

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Time

Unix Timestamp Converter

Convert Unix timestamps (seconds/millis) to human-readable dates and local times.

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Time math

Date & Time Difference

Calculate the precise duration between two dates in years, months, days, and seconds.

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Transport

URL & Base64 Converter

Encode or decode text to URL-safe strings or Base64 format.

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Images

WebP Image Converter

Convert images to the modern WebP format for better web performance.

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Data & Analysis

10
Diffing

Text Diff Viewer

Compare two text files or strings side-by-side with line numbers and highlighting.

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Data Quality

CSV Data Profiler

Analyze CSV files for column statistics, null types, and data patterns.

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Data Quality

Parquet File Profiler

Inspect Apache Parquet files for schema details, row counts, and column statistics.

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Content

Word Cloud Visualizer

Visualize the most frequent words in your text with a customizable cloud.

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Structured data

JSON Formatter

Format, validate, and minify JSON data with error highlighting.

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Markup

XML Formatter

Format and prettify XML strings with proper indentation.

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Database

SQL Formatter

Format and prettify SQL queries into clean, readable code for various dialects.

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Binary

Bitwise Calculator

Perform low-level bitwise operations and convert between binary and decimal.

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Imaging

EXIF Data Viewer

View and edit EXIF metadata, including GPS location and camera settings.

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Data

Parquet Viewer

Open and inspect Apache Parquet files directly in the browser.

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DevOps

3
Automation

Crontab Generator & Validator

Validate and generate cron schedule expressions with next-run previews.

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Permissions

Chmod Permission Calculator

Calculate file permissions in octal (755) and symbolic (rwxr-xr-x) formats.

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Schedule

Timezone Converter

Convert between different timezones and plan international meetings.

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Generators

4
Identity

UUID Generator

Generate random UUIDs (v4) for database keys and unique identifiers.

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Content

Lorem Ipsum Generator

Generate standard Lorem Ipsum placeholder text for design mockups.

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Sharing

QR Code Generator

Generate QR codes for URLs, text, email, or WiFi connection details.

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Mock Data

Fake Data Generator

Generate realistic mock data for testing and export as JSON, CSV, or SQL.

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Security

3
Security

JWT Debugger

Decode, verify, and debug JSON Web Tokens without sending them to a server.

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Passwords

Password Generator

Create strong, random passwords with custom requirements like symbols and numbers.

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Integrity

Hash Generator

Calculate cryptographic hashes for text or files using MD5, SHA-256, and more.

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Web & Frontend

6
URLs

URL Slug Generator

Generate clean, SEO-friendly URL slugs from any string with custom delimiters.

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Images

SVG Placeholder Generator

Generate SVG placeholder images with custom dimensions, colors, and text.

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Regex

Regex Tester

Test and debug regular expressions against sample text with real-time matches.

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Colors

Tailwind Palette Generator

Generate a complete Tailwind CSS color palette from a single hex code.

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Writing

Markdown Live Preview

Write Markdown with a real-time side-by-side HTML preview.

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Keyboard

Keycode Visualizer

Visualize JavaScript keyboard events, codes, and modifiers in real-time.

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Open source and community driven

Dev Tools is free and open source. We welcome contributions, bug reports, and feature requests. Help us make developer life a little bit easier.

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