Batch conversion
Drop in a whole pile of files and convert them all in one pass. See the before → after size for every item.
100% on-device · No subscription
Convert images, PDFs & audio — right on your phone
No upload. No account. No subscription. One-time Pro unlock.
Coming soon to theApp Store
Built different
Most converters ship your private files to a server. FormatFox does the work on your iPhone — fast, private, and built for real workflows.
Audio transcode
Move audio between M4A, WAV, AIFF and CAF without any cloud round-trip — entirely on-device.
“Convert with FormatFox” Share Extension
Convert straight from Photos, Files or any app via the share sheet. No copy-paste, no detour.
100% on-device
Nothing is uploaded. Nothing leaves your phone. FormatFox works in Airplane Mode — your files stay yours.
Free to start. Pro when you need it.
The free tier is genuinely useful on its own. Unlock Pro once — pay once — and keep it forever. No subscription, ever.
Free
Always free
- HEIC ↔ JPG / PNG conversion
- Resize images
- Images → PDF
- Everything on-device — nothing uploaded
- Supported by a single banner ad
FormatFox Pro
€4.99 · one-time unlock
- Batch conversion of many files at once
- Audio transcode (M4A, WAV, AIFF, CAF)
- Quality & compression control
- EXIF metadata preservation
- “Convert with FormatFox” Share Extension
- No ads
Your files never leave your phone
FormatFox processes everything locally using your device’s own image, PDF and audio frameworks. Your photos, documents and recordings are never collected, uploaded, or transmitted to any server — so it even works fully offline. Read the details in our Privacy Policy.