Free Developer Tools
Fast, free developer tools — no sign-up required, and built with privacy in mind.
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Free Tools
Free tools you can use right now, with new ones added every week.
8
Languages
Available in 8 languages, so more developers can use it comfortably.
100%
Private
Everything runs locally in your browser — nothing is ever uploaded.
$0
Forever Free
No subscriptions, no hidden fees, and no credit card required.
Featured Tools
JSON Formatter
Format, validate, minify and browse JSON as a tree — instantly, in your browser.
Base64 Encoder & Decoder
Encode and decode Base64 for text, files and images — with data URIs, in your browser.
UUID Generator
Generate v4, v7, v1, v3 and v5 UUIDs — one or a thousand at once — and inspect any UUID.
Password Generator
Generate strong, random passwords with a strength meter — secure, free, in your browser.
Regex Tester
Test regular expressions live: matches, capture groups and replace, in your browser.
Image Converter
Convert images to WebP, PNG or JPG in bulk, with quality and resize controls, in your b...
QR Code Generator
Create free QR codes for URLs, Wi-Fi, contacts and text — styled, with logo, PNG or SVG.
All Tools
JSON Formatter
Format, validate, minify and browse JSON as a tree — instantly, in your browser.
Base64 Encoder & Decoder
Encode and decode Base64 for text, files and images — with data URIs, in your browser.
URL Encoder & Decoder
Percent-encode and decode URLs, query strings and parameters, in your browser.
UUID Generator
Generate v4, v7, v1, v3 and v5 UUIDs — one or a thousand at once — and inspect any UUID.
Password Generator
Generate strong, random passwords with a strength meter — secure, free, in your browser.
Regex Tester
Test regular expressions live: matches, capture groups and replace, in your browser.
Color Converter
Convert HEX, RGB, HSL, HSV, CMYK and OKLCH, build palettes and check contrast — in your...
Image Converter
Convert images to WebP, PNG or JPG in bulk, with quality and resize controls, in your b...
QR Code Generator
Create free QR codes for URLs, Wi-Fi, contacts and text — styled, with logo, PNG or SVG.
Hash Generator
MD5, SHA-1, SHA-256 and SHA-512 hashes for text or files, with a checksum checker — in ...
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back, in any time zone, with the live epoch.
JWT Decoder
Decode JSON Web Tokens locally: header, payload and claims, without sending the token a...
Why Developers Choose LogicUtil
100% Free, Forever
Every tool is completely free to use, with no hidden fees, subscriptions, or usage limits.
No Sign-up Required
Jump straight in and start working. There's no account to create and no email to hand over.
Runs in Your Browser
Your data never leaves your device. Every tool processes everything locally for full privacy.
Instant Results
No waiting on servers. Get formatted, validated, or generated output the moment you type.
Free Online Tools for Developers, No Strings Attached
LogicUtil is a growing collection of free online developer tools designed to make everyday coding tasks faster and simpler. Whether you need to format JSON, test a regular expression, generate a UUID, or convert data between formats, you'll find a fast, no-nonsense tool built for exactly that job.
Every tool on LogicUtil runs entirely in your browser. Nothing you paste or upload is ever sent to a server, which means your code, data, and files stay private. There's no sign-up, no watermark, and no paywall — just open the tool and get to work.
New tools are added regularly based on what developers actually use day to day, and the site is available in multiple languages so more people around the world can use it comfortably.
Frequently Asked Questions
Is LogicUtil really free to use?
Yes. Every tool on LogicUtil is 100% free, with no hidden costs, subscriptions, or usage limits — now and in the future.
Do I need to create an account?
No. You can use any tool immediately without signing up, logging in, or providing an email address.
Is my data safe when I use these tools?
Yes. Most tools run entirely in your browser, so the text, code, or files you work with are processed locally and never uploaded to a server.
What kind of tools does LogicUtil offer?
LogicUtil covers common developer needs like text and encoding utilities, code formatters, generators, and other everyday tools, with new ones added regularly.
Can I use LogicUtil on my phone or tablet?
Yes. The site is fully responsive and every tool works on mobile, tablet, and desktop browsers.
Will new tools be added in the future?
Yes. LogicUtil is actively growing, and new tools are added based on what developers request and use most often.