Reduce HEIC Size By 90%

uploading

Compression instructions below

How do I reduce HEIC size by 90%?

  1. Select image files
    Click on "Select HEIC to compress" to select the files you wish to reduce in size Reduce HEIC Size By 90% Reduce HEIC Size By 90%
  2. (Optional) Set compression level
    It will list out the files you selected. You can adjust the level of reduction (default is 90%) and resolution by clicking on the value and selecting a new value from the dropdown. Reduce By
  3. Compress images
    Click on the green "Compress" button at the bottom to start the compression process.
  4. Save compressed images
    Once all files have been compressed, you will be presented with files again. Click on "Preview" to see the new images in browser. If you are happy with it, then click on "Save" to save the compressed files to your computer. Save
More how-to guides
  1. Select from Dropbox
    Click the down arrow (▾) next to the file selection button, then choose "Select from Dropbox". Select from Dropbox
  2. Pick your images
    A small ezyZip window opens. Click "Continue to Dropbox", sign in to Dropbox if asked, then pick what you want to compress.
  3. Compress the images
    ezyZip downloads your selection into your browser. Then follow the instructions above.
  4. Save to Dropbox
    When your file is ready, click the down arrow (▾) next to the save button and choose "Dropbox". The first time, Dropbox asks you to allow ezyZip access.

    Files are saved in the /Apps/ezyZip folder.
  1. Select from Google Drive
    Click the down arrow (▾) next to the file selection button, then choose "Select from Google Drive". Select from Google Drive
  2. Sign in and pick images
    A Google Drive window opens. Sign in to Google if asked, allow ezyZip to access the files you choose, then pick what you want to compress.
  3. Compress the images
    ezyZip downloads your selection into your browser. Then follow the instructions above.
  4. Save to Google Drive
    When your file is ready, click the down arrow (▾) next to the save button and choose "Google Drive". Sign in to Google if asked.

    Files are saved in the My Drive/ezyZip folder.

Frequently asked questions

It depends on the image and on how much you reduce it. A light reduction usually looks the same, especially on large photos, while a heavy reduction makes the loss in quality easier to see. You can preview the result before saving it, and start again with a smaller reduction if needed.
ezyZip is an online tool that supports any OS that can run a modern browser. We have tested it to work with Windows, MacOS, Linux (e.g. Ubuntu, Mint, Debian), Android, ChromeOS (Chromebook), iOS (iPhone, iPad & iPod Touch).

We are continuously updating the system, so ensure you are using the latest version of one of the popular browsers or their variants. (e.g. Chrome, Firefox, Safari, Opera).

Please let us know via the feedback form if you have any issues.
ezyZip is a set of utilities for dealing with compressed files. It is a free online utility to compress your files to a smaller size, including this tool to reduce HEIC files by 90%. No need to install any additional software. It supports a myriad of other image compression options too.

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 you'll 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 percentage-based compression is faster

ezyZip's WebAssembly engine calculates optimal compression parameters in real-time to achieve percentage-based size reduction for HEIC images. Here is why local processing is faster:

  • Adaptive QuantizationAlgorithms run locally in WASM linear memory, iterating rapidly to match your target percentage without server communication latency. The encoder automatically adjusts quality parameters to achieve your specified reduction — whether that's 25%, 50%, or 90% smaller.
  • Batch ProcessingEntire photo libraries can be processed through dedicated Web Workers. Each image receives individually optimized compression parameters to hit the target percentage, since the same quality setting produces different size reductions on different images.
  • Memory-Efficient OutputThe Origin Private File System stages compressed outputs for efficient batch downloading. Processed images queue on disk rather than in browser memory, so even hundreds of high-resolution images can be compressed in a single batch.
  • Visual Quality OptimizationThe percentage-based algorithm prioritizes perceptual quality, reducing file size while preserving visual detail in areas the human eye notices most — faces, text, and sharp edges receive higher quality than smooth gradients.

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