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Everyday developer
tools

JSON formatter, Base64 encoder, regex tester and more. Essential developer tools, fast and clean.

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Formatters & Validators

{ }

JSON Formatter

Format and validate JSON data for easy reading.

Regex Tester

Test regular expressions in real-time and view matches.

Diff Checker

Compare two texts and visually highlight differences.

M↓

Markdown Preview

Preview Markdown syntax in real-time.

SQL

SQL Formatter

Format SQL queries for easy reading.

Encoding & Decoding

B64

Base64 Encoder/Decoder

Encode or decode Base64 strings.

%20

URL Encoder/Decoder

Encode or decode URL strings.

JWT

JWT Decoder

Decode JWT token header and payload.

Generators

#id

UUID/ULID Generator

Generate UUID v4, ULID, and NanoID. Supports bulk generation.

Hash Generator

Generate MD5, SHA-1, SHA-256 and other hashes.

QR Code Generator

Instantly generate QR codes from text or URLs.

Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences, or words.

🔐

Password Generator

Generate secure random passwords with custom length and character options.

⏲

Cron Expression Builder

Build cron expressions with GUI and preview next run times.

Converters

⏱

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

🎨

Color Converter

Convert between HEX, RGB, and HSL color values.

Y{}

JSON YAML Converter

Convert between JSON and YAML formats.

Text Case Converter

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

Cheatsheets

Git

Git Cheatsheet

Git commands organized by category.

🐳

Docker Cheatsheet

Docker and Docker Compose commands reference.

200

HTTP Status Codes

HTTP status codes organized by category with descriptions.

⏰

Cron Expression Guide

Guide to cron expression syntax with examples.

🐧

Linux Cheatsheet

Essential Linux commands organized by category.

/.*/

Regex Cheatsheet

Regex syntax and common patterns reference.

More tools

New tools are being added continuously.

DevDogu is a free collection of online developer tools. All tools run client-side, so your data is never sent to servers. Use them directly in your browser without any installation.

Everyday developertools