Online Convert File is a free web-based platform that lets you convert images, videos, audio files, and documents between dozens of formats. Image conversions run entirely in your browser — no upload needed. For video, audio, and document conversions, files are securely uploaded to our servers, processed using industry-standard tools, and automatically deleted shortly after processing.
Our Mission
We believe file conversion should be simple, free, and as private as possible. Too many online converters force you to wait in long queues, pay for basic features, or keep your files indefinitely on their servers. We built Online Convert File to change that.
Our goal is to provide the fastest, most accessible file conversion experience — where image conversions are completely private (they never leave your device), and server-side conversions are processed securely with automatic cleanup so your files don't linger on our infrastructure.
What We Offer
Online Convert File provides a comprehensive suite of free conversion tools designed for everyday use:
- Image Converter (browser-based) — Convert between JPG, PNG, WebP, AVIF, BMP, GIF, TIFF, and ICO with adjustable quality and resize options. Over 56 format combinations available. All processing happens locally in your browser using the Canvas API — your images are never uploaded. No file size limit.
- Video Converter (server-side) — Convert video files between MP4, WebM, AVI, MOV, MKV, GIF, and other formats. Up to 2 GB per file. Videos are uploaded to our server and processed using FFmpeg. Files are automatically deleted within 4 hours of upload.
- Audio Converter (server-side) — Transform audio between MP3, WAV, FLAC, AAC, OGG, M4A, and more with customizable bitrate settings. Up to 500 MB per file. Audio files are uploaded and processed server-side using FFmpeg, then automatically deleted within 4 hours.
- Document Converter (server-side) — Convert PDFs, Word documents, spreadsheets, and presentations between popular formats. Up to 100 MB per file. Documents are uploaded and processed using LibreOffice on our server, then automatically deleted within 4 hours.
- Utility Tools (browser-based) — QR code generator, Base64 encoder/decoder, image compressor, password generator, and color picker — all running locally in your browser.
How It Works
Image Conversions — 100% Browser-Based
When you drop an image onto our converter, your browser reads the file locally, processes it using the HTML5 Canvas API, and outputs the converted file — all without sending a single byte to our servers. This means image conversions are instant, unlimited, and completely private.
Video, Audio & Document Conversions — Secure Server-Side
Video, audio, and document files require powerful processing tools that cannot run in a browser. For these conversions, your file is uploaded to our server over an encrypted HTTPS connection. The file is processed in an isolated temporary directory using FFmpeg (for video and audio) or LibreOffice (for documents). The converted file stays available for download for a limited time. A cleanup process runs every 5 minutes and removes all files — including any abandoned jobs — within 4 hours of upload (within 1 hour for the PDF tools).
Image conversions never leave your device. Server-side files (video, audio, documents) are stored temporarily in isolated directories and automatically deleted — whether the conversion succeeds, fails, or is abandoned. Your IP address is used only for rate limiting and abuse prevention and is never shared with third parties.
Why Choose Us
There are many file converters on the internet, but Online Convert File stands apart for several important reasons:
- No registration required — Just open the page and start converting. No accounts, no email verification, no personal data collected.
- Completely free — All tools are available at no cost, with no hidden fees, premium tiers, or "freemium" limitations.
- Privacy-conscious — Image conversions happen entirely in your browser. Server-side files are processed in isolation and automatically deleted within a few hours.
- Batch processing — Convert multiple images at once with a single click, saving you time on repetitive tasks.
- Wide format support — Over 56 image conversion combinations, plus dozens of video, audio, and document formats.
- No software to install — Everything runs through your web browser. Works on Windows, macOS, Linux, iOS, Android, and ChromeOS.
Technology Behind the Scenes
Online Convert File is built on a modern technology stack designed for performance and reliability:
- Image conversion — Uses the browser's native Canvas API and supports cutting-edge formats like AVIF and WebP. No server interaction required.
- Video & audio conversion — Powered by FFmpeg, the same open-source multimedia framework trusted by professional broadcast and streaming services worldwide. Files are processed on our Debian Linux server.
- Document conversion — Powered by LibreOffice, the leading open-source office suite, capable of handling PDF, DOCX, XLSX, PPTX, and many other formats.
- Infrastructure — Debian 13 Linux server running Nginx web server with PHP, ensuring fast page loads and efficient resource usage.
Automatic cleanup scripts run via cron every 5 minutes to remove all temporary files, ensuring nothing persists on the server beyond the expiry window. Conversion metadata (format, file size and a pseudonymous visitor ID — never the IP address itself) is logged to a local database for internal statistics — this data is never shared with third parties.
File Size Limits
To ensure fair usage and server stability, the following limits apply to server-side conversions:
- Video files — Maximum 2 GB per file
- Audio files — Maximum 500 MB per file
- Document files — Maximum 100 MB per file
- PDF tools — Maximum 50 MB per file
- Image files — No limit (processed locally in your browser)
Only one active server-side conversion is allowed per user at a time. If the server is busy, you may be queued briefly before your conversion begins.
Our Commitment
We are committed to keeping Online Convert File free, fast, and privacy-respecting for everyone. We continuously work to add new formats, improve conversion quality, and expand our tool offerings. Your trust matters to us, and we will never sell your data or start charging for features that are currently free.
If you find our tools useful, the best way to support us is by sharing Online Convert File with friends, colleagues, and on social media. Every recommendation helps us grow and continue providing free tools to people around the world.
Contact Us
We love hearing from our users. Whether you have a feature request, found a bug, or just want to say hello, feel free to reach out:
You can also visit our Contact page to send us a message directly.