Castform

Castform is the fastest way to convert HEIC and HEIF images from your iPhone camera into any format you need — without ever leaving your device.

No cloud uploads. No subscriptions. No compromises. Everything happens on-device using native Apple frameworks, so your photos stay completely private.

CONVERT TO ANY FORMAT
Pick from 7 output formats:
- JPEG — universally compatible, great for sharing
- PNG — lossless quality, perfect for graphics
- WebP — modern format, smaller file sizes
- PDF — single or batch images as a document
- TIFF — professional, uncompressed quality
- BMP — classic bitmap for legacy compatibility
- GIF — animated-friendly format

BUILT FOR SPEED
Castform is a single-purpose tool designed to do one thing exceptionally well. Select your output format, tap the upload zone, pick your photos, and you're done. Batch-convert up to 20 images in a single session.

COMPLETELY ON-DEVICE
Your photos never leave your iPhone. Castform uses Apple's ImageIO, CoreImage, and PDFKit frameworks exclusively — no third-party image processing, no server requests, no account required.

SHARE SHEET INTEGRATION
Convert directly from the Photos or Files app. Tap Share on any image, choose Castform, pick your format, and the converted file is ready to save — without ever opening the app.

CONVERSION HISTORY
Castform keeps your last 10 conversions in a history list. Tap any item to re-export it again in the same format whenever you need — no need to reconvert.

CLEAN & FOCUSED DESIGN
A minimal, distraction-free interface designed around your workflow. No unnecessary features, no ads, no noise.