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You can reduce heic file size by setting a specific desired output file size or reduce by percentage.
  1. Enter the desired HEIC file size in kilobytes and then click "Next".
    Reduce heic Below Specific Size
  2. To reduce HEIC by percentage, click the "By Percentage" tab and enter your desired percentage reduction. E.g. 30 for 30% file size reduction and click "Next".

    Reduce heic By Percentage
You will be redirect to the correct file compression page. The page contains further instructions for reducing HEIC file size.

At ezyZip, we offer an advanced compression feature that allows you to reduce the size of your HEIC files either by setting a specific target file size or by selecting a percentage reduction. This functionality is perfect for tailoring HEIC files to meet various requirements or limitations. Whether you need to comply with size constraints for uploads and emails, or simply want to save disk space, you can easily customize the compression to fit your needs.

ezyZip processes files directly in your browser. Unlike most online tools, your files are not uploaded to our servers, which means faster processing and better privacy. Take a look at the feature comparison below and we think youll agree that ezyZip is the better choice for your file conversion needs.

Feature ezyZip Other Online Tools
No Software Installation Works Directly in Browser Works Directly in Browser
Processing Location Your Browser (No Upload) Their Servers (Upload Required)
Privacy & Security 100% Private (Files Never Leave Your Device) Files Uploaded, Accessible by Others
Processing Speed Fast (No Upload/Download Time) Slow (Upload + Process + Download)
Registration Required Never Often Required for Large Files
Works Offline Yes (After Page Load) No
Image Format Support 100+ Image Formats Limited (JPEG, PNG, GIF only)
Compression Quality Smart Quality Optimization Basic Compression
Batch Processing Process Multiple Images One at a Time
Cost 100% Free Free with Limitations / Paid Tiers
Established Since 2009 (15+ Years) Recent (May Disappear)

Why client-side HEIC image compression keeps your photos private

Every pixel of your HEIC images is processed within your browser's WebAssembly sandbox when using ezyZip. Here is why local image compression is technically superior:

  • Desktop-Class EngineThe Emscripten-compiled image processing engine runs the same class of algorithms used by professional desktop tools — including advanced quantization, chroma subsampling, and progressive encoding — entirely within isolated browser memory.
  • Multiple Compression ModesChoose between quality-based, percentage-based, or target-size compression. Each mode uses a different optimization strategy to balance visual quality against file size for your specific needs.
  • Efficient Batch DownloadsCompressed outputs are staged through the Origin Private File System for efficient batch downloading. Process and download hundreds of images in a single operation without repeated file-picker interactions.
  • Automatic CleanupSession cleanup ensures processed image data does not persist beyond your active browser session. Temporary files in the Origin Private File System are automatically purged when stale, keeping your browser storage clean.