️ Free Online Services and Web Tools

OpenLibs.dev is a global open platform uniting fast, secure, and completely free online services for working with media, documents, graphics, and code.

For Users
A catalog of ready-made web apps to solve everyday tasks in one click — no registration, subscriptions, or limits.
For Developers
An interactive sandbox with clean source code, documentation, and direct CDN links for project integration.

Key Service Categories

Graphics and Images

Tools for visual content processing. Online editors, cropping, resizing, file size optimization, filters, and graphic element generators.

Media File Converters

Comprehensive web compressors and converters for any video and audio formats. Change extensions, compress heavy files, or extract audio tracks directly in your browser.

Documents and PDF

Universal office utilities. Secure file conversion between text formats, spreadsheets, and PDF, page merging, text recognition (OCR), and document analysis.

Encoders and Security

Professional tools for encryption, hashing, and data transformation. Quick conversion of numeral systems, string encoding, password generators, and cryptographic utilities.

Health, Sport, and Fitness

Simple calculators for those who care about their well-being. Calculate Body Mass Index (BMI), daily calorie and water needs, interval training timers (Tabata), and activity logs.

Counters and Analytics

Smart calculators, interactive graph builders, text analyzers, character counters, and timers to visualize and structure any data.

Main Advantages of Services on OpenLibs

100% Privacy

All calculations and file processing take place exclusively inside your browser (Client-Side). Your data is never uploaded to our servers.

Unlimited Speed

Thanks to the power of modern JavaScript and WebAssembly technologies, conversion and processing happen instantly right on your device.

Full Freedom and MIT

No hidden subscriptions, limits, or watermarks. Use the tools yourself or take the source code into your own commercial projects.

Frequently Asked Questions (FAQ)

OpenLibs is an open web platform that unites free online services, tools, and generators. Each service on the site works as an interactive app inside your browser and is built on top of popular open-source JavaScript libraries.

Yes, absolutely all tools on the site are 100% free. We have no hidden subscriptions, paid features (Pro versions), limits on the number or size of files, and watermarks are never applied to the finished content.

All services use Client-Side technology (processing on the client side). This means that when you convert a video, edit a photo, or analyze a document, your own device performs all calculations using JavaScript and WebAssembly. Our server does not participate in processing your files.

It is as safe as possible. Since your files, personal data, and texts are processed locally in your browser and are not transmitted anywhere, it is impossible to intercept or steal them. You maintain complete confidentiality.

All tools are built on the basis of open-source solutions under the MIT license. This is the freest license in the world. It allows developers not just to use the services, but also to copy their source code, modify it, and use it for free in any of their projects, including commercial startups and websites.

On the page of each specific online service, there is a special section for developers. There you will find a link to the original GitHub repository of the library, setup instructions, clean source code, and ready-made CDN links for quick connection to your website.

Yes, OpenLibs is fully adapted for any devices. All online tools support responsive design and PWA (Progressive Web Apps) technology, so they work equally fast and conveniently on powerful computers, smartphones, or tablets.