How to Batch Compress Images
Stop compressing photos one at a time. ImageMint lets you drop hundreds of files, processes them in parallel using Web Workers, and gives you a single ZIP at the end — without sending anything to a server.
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Open Image CompressorStep-by-Step Guide
- 1
Drag the entire folder onto the dropzone
You can drag a Finder/Explorer folder selection or use Ctrl/Cmd + A inside the file picker. ImageMint accepts JPG, PNG, WebP, AVIF, and HEIC mixed together.
- 2
Choose one quality preset for the whole batch
Pick "Web (80)" for emails and websites, or "Print (90)" for archival quality. The same setting applies to every file, but each format uses its own optimal codec under the hood.
- 3
Download a single ZIP
When the progress bar hits 100%, click "Download ZIP". The original folder structure is preserved, so you can drop the result straight back into your CMS or photo library.
Pro Tips
- Web Workers run in parallel — closing your laptop lid pauses processing safely; reopening resumes from where it stopped.
- For mixed batches, ImageMint detects the format per file. PNGs go through OxiPNG (lossless), photos go through MozJPEG or libwebp.
- If you only need a sample, use the per-file delete button to drop unwanted files before pressing Compress.
Frequently Asked Questions
How many images can I compress at once?
There is no hard limit. We have tested 2000-file batches on a MacBook Air. The bottleneck is RAM, not the tool — if your device has 8 GB free, ~1500 photos at 12 MP is comfortable.
Does it work offline?
Yes. Once the page loads, you can disconnect Wi-Fi. ImageMint is a Progressive Web App and the codecs run as WebAssembly inside your browser.
Will my filenames change?
No. ImageMint keeps the original filename and only changes the extension if you opted to convert format (e.g. .heic → .jpg). Subfolders are preserved inside the ZIP.
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