Compress HEIC to 100KB
Automatically compress any HEIC photo to 100KB or less — for admissions and online forms.
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How to compress HEIC
- Upload your HEIC (up to 50 MB).
- The compressor automatically targets 100 KB or under.
- Download the compressed HEIC — ready to upload or send.
Quick fact about HEIC
100 KB is a good balance for HEIC — enough to preserve the recognizable quality of an iPhone photo, small enough for web uploads and forms. HEIC's efficiency means 100 KB goes further than with JPG.
Why compress HEIC?
100 KB is the most common web upload cap, and it works well for HEIC — because HEIC is more efficient than JPG, a 100 KB HEIC can look as good as a 150-200 KB JPG. This is useful for iPhone photos being uploaded to websites, sent via email, or submitted to forms with a 100 KB limit.
Technical details
| Input format | HEIC, HEIF |
| Output format | HEIC |
| Target size | 100 KB or under |
| Codec | HEVC (H.265) |
| Iteration | Quality auto-tuned until target met |
| Typical quality | 70-80% at 100 KB |
| Transparency | Preserved (rare in HEIC) |
| Max file size | 50 MB per file |
| File retention | Auto-deleted after compression |
How the conversion works
The compressor decodes the HEVC-compressed HEIC image and re-encodes it using libheif at a lower quality setting. If the output exceeds 100 KB, it reduces quality (and if necessary, dimensions) until the target is met. At 100 KB, a HEIC is typically 800-1200px wide with quality 70-80%.
When to compress HEIC
- Uploading iPhone photos to websites (100 KB cap).
- Sending HEIC photos via email (small enough for fast sending).
- Compressing iPhone photos for social media.
- Reducing HEIC storage footprint.
- Preparing HEIC photos for web forms.
- Sharing photos via apps with 100 KB limits.
- Any platform with a 100 KB HEIC limit.
Quality considerations
100 KB is a good balance for HEIC — enough to preserve recognizable quality, small enough for web and email. Expect 800-1200px wide with quality 70-80%. HEIC's efficiency means 100 KB goes further than with JPG.
Limitations and caveats
- 100 KB limits resolution — typically 800-1200px wide.
- Very detailed photos may show softening.
- HDR metadata may be lost at lower quality settings.
- Not suitable for print.
- For higher quality, use the 200 KB or 500 KB variant.
Compatibility
- Compressed HEIC opens natively on iOS 11+, iPadOS, macOS High Sierra+.
- Windows 10/11 supports HEIC with the free HEIF Image Extensions.
- Syncs with iCloud Photos.
- Accepted by WordPress, Shopify, Wix, Squarespace (with HEIC support).
- Standard HEIC — no special software needed on Apple devices.
Tips for best results
- 100 KB is the sweet spot for HEIC on the web.
- HEIC is more efficient than JPG — 100 KB HEIC ≈ 150 KB JPG quality.
- Crop to the target display size before uploading.
- HEIC opens natively on Apple devices.
- Batch-compress up to 50 MB of HEIC files at once.
Compression levels explained
| Level | Size reduction | Best for |
|---|---|---|
| Auto-target 100 KB | Variable (until 100 KB) | Web, email, forms |
Target a specific file size
Need to hit an exact size? Use our dedicated target-size tools:
Common problems and fixes
- HEIC can't reach 100 KB without significant quality loss
- Try cropping or resizing first, or use the 200 KB variant. 100 KB is tight for full-resolution iPhone photos.
- Compressed HEIC won't open on Android
- HEIC requires third-party apps on Android. Convert to JPG for cross-platform sharing.
- Photo looks soft after compression
- At 100 KB, some softening is expected. Use the 200 KB variant for better quality.
Frequently asked questions
Explore related tools
Sources and references
Last reviewed: 2026-10-01