Image converter & compressor that never uploads your files
Turn JPG, PNG, HEIC, WebP and AVIF into the format you need, or make them smaller. It all runs inside your browser, free.
Free, private, right here on your phone.
What do you need?
Popular conversions
All conversionsMost converters upload your photos. This one can't.
FileFlux does the work on your own device, so there is no upload to wait for and no copy on anyone's server.
| Question | FileFlux | Upload-based converters |
|---|---|---|
| Where your images go | Stay on your device | Sent to a server, deleted later |
| Before it starts | Nothing, it starts instantly | Wait for the upload |
| No connection | Keeps working | Stops |
| Account | Never needed | Often needed for bigger files |
How it works
- 01
Add your images
Drop them, paste them, or pick them from your photos. iPhone HEIC files work too.
- 02
Choose what you need
A new format, a smaller file, or both. Compare before and after to check the quality.
- 03
Save or share
Download one file or all of them as a zip. On a phone, share straight to another app.
Questions
Are my images uploaded anywhere?
No. Converting and compressing happen in your browser, so your files never leave your device. The counter on the page shows how much has been sent: zero.
Is FileFlux free?
Yes. There are no fees, subscriptions or accounts, and no daily limits.
Which formats can I use?
JPG, PNG, HEIC, WebP, AVIF, GIF, BMP and SVG in, and JPG, PNG, WebP, AVIF, PDF, BMP, GIF or SVG out. PDFs and Word, Excel and PowerPoint files can be compressed and merged too.
Will compressing make my photos look worse?
Not noticeably at the default setting. Drag the compare slider on any image to check, and if a file can't get smaller, FileFlux keeps the original.
How many files can I process at once?
Up to 20 images at a time, as often as you like. Everything runs on your device, so very large batches depend on its memory.
Why FileFlux is the Safest Way to Convert Files Online
Most online file converters require you to upload your sensitive documents to their servers. This poses a significant security risk, as your data is stored in the cloud and could be accessed by third parties.
FileFlux changes the game. Our platform leverages WebAssembly and modern browser APIs to process your files 100% locally on your device. Whether you are converting a confidential PDF or compressing personal photos, your data never leaves your browser. No uploads, no server storage, and no tracking.
- True Client-Side Processing
- Zero Latency Uploads
A Complete Toolbox for Your Digital Workflow
FileFlux isn't just an image converter. It's a comprehensive suite designed to handle all your daily file management needs without the bloat of traditional software.
High-Performance Image Conversion
Switch between JPG, PNG, WebP, AVIF, and SVG with professional-grade color accuracy. Optimize for web performance or maintain lossless quality for print.
Powerful Document Tools
Convert Word, Excel, and PowerPoint files to PDF in seconds. Merge multiple documents or compress large PDFs for easier email sharing—all within your browser.