25+ free tools — 100% offline

Free Developer Tools
That Work Offline

AltUtils is a collection of 25+ essential utilities for developers, designers, and SEOs. Everything runs 100% locally in your browser. No servers, no tracking, instant results.ags — all running entirely in your browser. Nothing is ever uploaded to a server.

Offline First

Works without internet

100% Private

Data stays on your device

Instant

No server round-trips

No Tracking

Zero cookies or telemetry

About AltUtils

Why AltUtils?

Most online tools upload your data to remote servers. AltUtils is different. Every tool runs 100% in your browser using modern Web APIs — your text, images, tokens, and passwords never leave your machine. It works offline, loads instantly, and is completely free.

25+
Tools
5
Categories
0
Server Uploads
100%
Free Forever

All Tools

Browse by category or press / to search.

Text Mastery

Transform, clean, count, and encode text with precision.

Dev Core

Format, validate, decode, and hash — all client-side.

Visuals

Optimize images, generate favicons, and convert colors.

Web & SEO

Build meta tags, robots.txt, sitemaps, and redirect chains.

Daily Life

Everyday utilities — passwords, QR codes, units, and more.

AltUtils

Free, offline-first developer tools. Built entirely on the client — zero data sent to the cloud.