Image Compressor for iPhone — Free, Fast & Private
iPhones take great photos, but those photos are big — often 3-8MB each, sometimes more. And by default, they are saved in HEIC format, which many websites, government portals, and older devices cannot open. You end up needing to both compress and convert, and the App Store solutions are mostly ad-filled or subscription-gated.
MiniPx solves both problems in Safari. Open the URL, pick photos from your library, compress them, and optionally convert HEIC to JPG in one step. No app download, no storage used, no permissions granted to a third-party app. Your photos never leave your iPhone.
HEIC is the key differentiator
Every iPhone since the iPhone 7 shoots in HEIC by default. HEIC is more efficient than JPEG — your photos take less storage — but it creates a compatibility problem when you need to upload a photo to a website that only accepts JPG. MiniPx handles HEIC to JPG conversion natively, so you can convert and compress in a single workflow.
Better than iOS Shortcuts workarounds
Some guides recommend using the iOS Shortcuts app to create a compression workflow. That works but it is fiddly to set up, limited in options (no target size, no format conversion beyond what Shortcuts supports), and confusing for non-technical users. MiniPx gives you a visual interface with clear controls — pick a quality preset or set a target size, and you are done.
What about paid apps?
Apps like Image Size, Compress Photos, and Photo Compress charge for batch processing, target-size compression, or ad removal. Some upload your images to their servers. MiniPx offers all of these features for free with no ads, no watermarks, and complete privacy.
Common iPhone use cases
Compressing photos for WhatsApp and email attachments. Reducing image size for government form uploads (100KB limit, 50KB limit). Converting HEIC to JPG for compatibility. Resizing photos for Instagram posts and stories. All of this works directly in Safari.