Developer Tools

53 free tools for developers. All processing happens in your browser - your data never leaves your device.

Popular Tools

JSON Formatter

Format and validate JSON

Developer Tools

YAML ⇄ JSON Converter

Convert between YAML and JSON formats

Developer Tools

Base64

Encode and decode Base64 strings

Developer Tools

Text Analysis

Character count, word count, and more

Text Tools

Color Palette from Image Generator

Extract color palettes from images

Design Tools

Password Generator

Generate secure passwords

Utilities

All Categories

Text Tools

7 tools

Text Analysis

Character count, word count, and more

Text Formatter

Format and beautify text

Diff Checker

Compare text differences

Case Converter

Convert text case (upper, lower, title)

List Randomizer

Randomize and shuffle lists

Lorem Ipsum Generator

Generate placeholder text for designs

+1 more tools

JSON Formatter

Format and validate JSON

Base64

Encode and decode Base64 strings

Hash Generator

Generate various hash values

URL Encoder

Encode and decode URLs

JWT Viewer

Decode and inspect JWT tokens

Cron Debugger

Debug and test cron expressions

+20 more tools

Pattern Generator

Create custom SVG patterns

Color Palette from Image Generator

Extract color palettes from images

CSS Unit Converter

Convert between px, rem, and em

Favicon Generator

Generate multi-platform favicons

Gradient Generator

Create beautiful CSS gradients

Web3 Tools

4 tools

ENS Lookup

Resolve ENS names to addresses and vice versa

Gas Calculator

Calculate Ethereum transaction costs in different currencies

Transaction Decoder

Decode Ethereum transaction data and function calls

Signature Verifier

Verify Ethereum signatures and recover signing addresses

DNS Tools

2 tools

DNS Lookup

Perform DNS lookups and view records

WHOIS Lookup

Look up domain registration information

Utilities

9 tools

Unit Converter

Convert between length, weight, temperature, area, and volume units

Password Generator

Generate secure passwords

Emoji Picker

Search and copy emojis easily

QR Code Generator

Generate customizable QR codes

Image Dimension Checker

Check image dimensions and file size

Dice Generator

Roll virtual dice with different sides

+3 more tools

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Fullstack developer specializing in React, Next.js, and Node.js. Let's build something amazing together!

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Developer Tools & Utilities | Thibault Mathian