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Compress HEIC to 100KB

Automatically compress any HEIC photo to 100KB or less — for admissions and online forms.

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Maximum file size: 50 MB

Your file is processed securely and deleted automatically after conversion. Your data is protected under GDPR.

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1 Select HEIC
2 Compress HEIC
3 Download Compressed HEIC

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How to compress HEIC

  1. Upload your HEIC (up to 50 MB).
  2. The compressor automatically targets 100 KB or under.
  3. 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

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

Compatibility

Tips for best results

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

How do I compress HEIC to 100 KB? +
Upload your HEIC — the compressor automatically targets 100 KB or under.
Is 100 KB enough for an iPhone photo? +
For web and email, yes. For print or large-screen display, use the 500 KB or 1 MB variant.
Does HEIC compression to 100 KB lose quality? +
Yes — but 100 KB in HEIC is roughly equivalent to 150 KB in JPG. The quality is still good for screens.
What dimensions will my HEIC be at 100 KB? +
Typically 800-1200px wide. The compressor prioritizes hitting the target size.
Can I compress multiple HEICs at once? +
Yes — upload multiple files. Each is compressed independently.
Will compressed HEIC open on Windows? +
Windows 10/11 with the HEIF Image Extensions opens HEIC natively.
What if my HEIC can't reach 100 KB? +
Very complex photos may need resizing. Try cropping first, or use the 200 KB variant.

Sources and references

Last reviewed: 2026-10-01