Your Essential Developer Tools

Fast, free, and runs entirely in your browser.

Your Essential Developer Tools

Fast, reliable, and 100% client-side tools for everyday development tasks. Format JSON, convert Epoch, encode Base64, parse URLs, and more—all for free.

Get Started with JSON Explore Epoch Converter

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⏱

Epoch

Convert Unix timestamps to dates instantly

{ }

JSON Formatter

Format, validate, diff, and beautify JSON

B64

Base64

Encode and decode Base64 strings

URL

Encode and decode URLs safely

≠

Text Diff

Compare two text files side by side

Case

Convert between camelCase, snake_case, kebab-case

010

Number Base

Convert between binary, octal, decimal, hex

HTML Entity

Encode and decode HTML entities

Lorem Ipsum

Generate placeholder text instantly

UUID

Generate and validate UUIDs

Hash

Generate SHA-1, SHA-256, SHA-512 hashes

JWT

JWT Decoder

Decode and validate JWT tokens

***

Password

Generate secure random passwords

123

Word Count

Count words, characters, and lines

QR Code

Generate QR codes from text or URLs

/.*/

RegEx Tester

Test and debug regular expressions

YML

YAML Formatter

Format and validate YAML configs

CSV

CSV ↔ JSON

Convert between CSV and JSON

⏰

Cron Parser

Cron schedules in plain English

SQL

SQL Formatter

Pretty-print SQL for any dialect

XML

XML Formatter

Format and validate XML

What Is My IP

See your public IP address

RGB

Color Picker

Hex and RGB color picker

Why Choose FastDevTools?

Lightning Fast

All tools run directly in your browser, ensuring instant results without server delays.

100% Private

Your data never leaves your browser. We don't store, log, or transmit any of your input.

Beautiful & Intuitive

Enjoy a clean, modern UI designed for developers, with dark mode support and a focus on UX.

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