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Free Developer Tools

Fast, simple tools for developers, students, and technical users.

No signup. No unnecessary uploads. Just useful tools.

Popular Tools

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JSON Formatter

Format, beautify, and minify JSON online.

JSON Validator

Validate JSON and get precise error locations.

SQL Formatter

Format and beautify SQL queries online.

Regex Tester

Test regular expressions with live match highlighting.

Image Compressor

Compress JPEG, PNG, and WebP images in your browser.

Word Counter

Count words, characters, sentences, and reading time.

Browse All Tools

Developer Tools

5 tools

JSON, SQL, and regex utilities for everyday development work.

Text Tools

2 tools

Word counting and text case conversion utilities.

Image Tools

2 tools

Compress and resize images entirely in your browser.

Color Tools

1 tools

Convert and preview colors across HEX, RGB, HSL, and HSB.

Markdown Tools

1 tools

Convert Markdown into clean, safe HTML.

Why Utilir?

Free to use

Every tool is free, with no usage limits or feature paywalls on the core functionality.

Fast and browser-based

Tools run locally in your browser using native web APIs — no waiting on a server round-trip.

No signup required

Open a tool and start using it immediately. No accounts, no email, no friction.

Latest Articles

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Color Tools

Understanding HEX, RGB, and HSL Colors

How HEX, RGB, HSL, and HSB color formats represent the same colors differently, and when each one is more useful to work with.

6 min read
Markdown Tools

How to Convert Markdown to HTML

How Markdown-to-HTML conversion works, common syntax to know, and why sanitizing the output matters when Markdown comes from an untrusted source.

5 min read
Image Tools

JPEG vs PNG vs WebP: Which Format Should You Use?

A clear comparison of JPEG, PNG, and WebP — how they compress, when transparency and animation matter, and how to pick the right format per image.

5 min read

FAQ

Is Utilir really free?
Yes. All current tools are free to use with no signup required. The site is supported by unobtrusive advertising.
Do I need to create an account?
No. Every tool works immediately without registration, login, or any personal information.
Is my data uploaded to a server?
Most tools, including JSON formatting, text tools, color conversion, and image compression, run entirely in your browser. Your content is not uploaded.
Can I use these tools on mobile?
Yes. Every tool is designed to work on phones, tablets, laptops, and desktops.