Edit your websites in plain English
Live
CompressKit
Compress & convert, on-device
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.
FAQ
Common Questions
Does CompressKit work offline?
Yes. All compression and conversion runs on your device using Apple's native frameworks. The app makes no network requests at all.
Does it upload my files?
No. Your files never leave your iPhone or iPad. There are no servers and no cloud — everything happens locally.
Which formats are supported?
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.
Is an account required?
No. There is no sign-up, no account, no phone number and no tracking. Open the app and start compressing.
Will compressing reduce quality?
You choose the balance. Presets range from visually lossless to maximum savings, and you can fine-tune quality, bitrate and resolution yourself.
More
Other Apps
Your Mac agents, in your pocket
AI voice studio, on your device
AI image studio, on your device
Local headlines, all 81 cities
Speak it. Print it.
Daily Quran & Hadith
Daily Bible Verse
Privacy inside Messages
Reminders & Live Activities
Self-hosted remote desktop server for macOS.
Open-source remote desktop client for macOS, iPhone, and iPad.
A modern IPTV player for Samsung Tizen TVs
A modern IPTV player for LG webOS TVs
IPTV Player for M3U Playlists
Your club, always in your Dynamic Island
Open LLMs that run entirely on your iPhone
Smart TV Remote Control
Daily Jewish Wisdom
A local model manager for iPhone
On-device SMS & call protection, with a model that learns from you
Multi-Agent AI Chat
Manage websites from your iPhone
Multi-provider AI chat
App Store Connect, faster
Intelligent BYOK AI chat for macOS