18 tools · Free · No sign-up · Client-side

Developer Utilities

Fast, free, and privacy-friendly tools for everyday development. All processing happens in your browser — your data never leaves your device.

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JSON & Data

3 tools

Validate, beautify, and minify JSON.

Compare two JSON objects and see the differences.

YAML ↔ JSON Converter

Convert between YAML and JSON for Kubernetes, Docker and CI/CD configs.

🔐

Encoding & Security

4 tools

Decode JWT locally in your browser.

Base64 Encoder / Decoder

Encode or decode Base64 strings.

URL Encoder / Decoder

Encode or decode URLs and query string parameters.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files.

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Generators

3 tools

Generate UUID v4 instantly.

QR Code Generator

Generate QR codes for links, Wi-Fi and text.

Lorem Ipsum Generator

Generate placeholder text for designs and mockups.

✍️

Text & Writing

2 tools

Word & Character Counter

Count words, characters, sentences and estimate reading time.

Markdown Editor & Preview

Write and preview Markdown in real time. Export to HTML or PDF.

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Regex & Scheduling

3 tools

Test and debug regular expressions.

Build and explain regex patterns.

Cron Builder & Explainer

Build cron expressions and see next run times.

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Design & Color

1 tool

Color Picker & Converter

Convert between HEX, RGB, HSL and CMYK. Generate shades and check contrast.

🖼️

Image Tools

2 tools

Image Compressor

Compress JPEG, PNG and WebP images in your browser. No uploads, no limits.

Resize images to exact pixels, percentage or social media presets.

Free online developer tools that respect your privacy

Devutilities.dev is a collection of 18 focused utilities that developers use every day. All tools run entirely in your browser — no sign-up, no pop-ups, no paywalls.

JSON & Data tools

The JSON Formatter validates, beautifies and minifies JSON. JSON Diff compares two objects side by side. The YAML ↔ JSON Converter handles Kubernetes manifests, Docker Compose and GitHub Actions workflows.

Your data stays in your browser

All tools process your input locally. JSON, tokens, files and text are never sent to any server.