Free online services, open-source web tools
OpenLibs.dev is a global open platform uniting fast, secure, and absolutely free online services for working with media, documents, graphics, and code.
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.
Popular Web Apps
Drawing and Image Processing
A complete tool for creating vector and raster graphics directly in the browser. Work with layers, filters, masks, and custom brushes.
Calculation of Clinical Indexes and Doses
Accurate medical calculations: BMI, creatinine clearance, risk scales, ideal weight, and drug dosage recalculation in one click.
Branding and Identity in Seconds
Design minimalist logos and monograms. Choose geometry, unique font pairings, and download the ready-made vector SVG source file.
Batch Format Conversion Without Losses
Convert WebP, PNG, JPEG, SVG, and HEIC in batches. Adjust compression level and optimize images for websites in seconds.
Visualization of Mathematical Functions
Plot graphs of mathematical functions, equations, and datasets. Customize coordinate axes, export tables and graphical charts.
Multi-track Audio Work
Visualize audio waves, mix tracks, record sound from a microphone, and make seamless cuts. Quick export of the finished mix to WAV or MP3.
Multifunctional Web Tool Online
Create single barcodes or instantly generate entire batches with automatic numbering (SKU). Customize sizes, text, labels, and export to PDF.
Customized Online Web Tool
Create unique QR codes tailored to your brand. Customize dot shapes, gradients, corners, and easily add your own logo without registration.
Work with Text and Tables Online
Create, edit, and format text documents directly in your browser. Full support for tables, lists, styles, and quick export to DOCX or PDF.
Edit and Merge Clips in the Browser
Trim tracks, add transitions, overlay background music and text onto videos without downloading heavy software. Rendering happens locally.
Task Planning and Personal Productivity
A convenient interactive calendar for managing schedules, notes, and to-do lists. Set up notifications, recurring events, and manage your time locally.
Complex mathematical and scientific calculations
Calculate trigonometric functions, logarithms, roots, powers, and work with matrices. The ideal tool for students, engineers, and scientists.
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.