CompressKit Support
CompressKit shrinks and converts your files without ever leaving your iPhone. Compress videos, photos, PDFs and audio with smart presets tuned to each file type, or convert between formats — extract audio from video, turn clips into GIFs, render PDF pages and more. Every file is processed entirely on-device with Apple's native frameworks: no accounts, no cloud, no trackers, and not a single network request. Pick a recommended preset or fine-tune quality, bitrate and resolution yourself, strip location and personal metadata with one tap, then save to Files, Photos, the clipboard or share anywhere.
Support
Common Topics
Yes. All compression and conversion runs on your device using Apple's native frameworks. The app makes no network requests at all.
No. Your files never leave your iPhone or iPad. There are no servers and no cloud — everything happens locally.
Video (MP4, MOV, M4V), images (JPEG, PNG, HEIC, GIF and more), audio (M4A, WAV, FLAC), PDF and ZIP archives, with conversions between many of them.
No. There is no sign-up, no account, no phone number and no tracking. Open the app and start compressing.
You choose the balance. Presets range from visually lossless to maximum savings, and you can fine-tune quality, bitrate and resolution yourself.