ℹ️ All compression happens in your browser. Nothing is uploaded anywhere.
Drop multiple images here
or click to browse — select multiple files
Choose ImagesJPG, PNG, WebP · Up to 20 images at once
✅ All Images Compressed
Compress multiple images at once and download them all together as a ZIP file. Perfect for preparing a whole folder for upload or email.
or click to browse — select multiple files
Choose ImagesJPG, PNG, WebP · Up to 20 images at once
This tool compresses multiple images at once, applying the same compression settings to each, and packages the results together into a single ZIP file for download. It's built for situations where you need to reduce the file size of many images in one go, rather than processing them individually.
All compression happens in your browser — your images are never uploaded to a server, even when processing many files at once.
The ZIP file contains each compressed image as a separate file, generally retaining the original filenames so you can identify which compressed file corresponds to which original. Extract the ZIP using your operating system's built-in tools (most systems support opening ZIP files natively) to access the individual compressed images.
When compressing many images at once with a single setting, it helps to think about the "worst case" image in your batch — the one that's most likely to show visible quality loss at a given compression level. A batch containing a mix of simple graphics (logos, screenshots with large flat areas of colour) and detailed photos will respond differently to the same compression setting: simple graphics tend to compress very well with little visible change, while detailed photos with fine textures or gradients are more likely to show artefacts at the same setting. If your batch is mixed, choosing a more conservative (less aggressive) compression level that the detailed images can tolerate well is usually safer than optimising for the simple images and risking visible quality loss on the photos.
Compressing images one at a time — uploading, waiting, downloading, repeating — adds up quickly even if each individual step is fast. For a batch of 20 photos, that's 20 separate upload-process-download cycles, each with its own small overhead. Bulk compression collapses this into a single pass: one upload step for all files, one processing pass, and one download. Beyond the time saved, this also reduces the chance of inconsistency — when compressing images individually over multiple sessions, it's easy to accidentally use slightly different settings for different images without realising, resulting in a batch where some images look noticeably different from others. A single bulk pass guarantees every image in the batch was treated identically.
If your batch is destined for a website — a gallery, a product catalogue, a blog's image library — bulk compression is often one step in a larger preparation process. Beyond compression, it's worth considering whether all images in the batch should also be resized to consistent dimensions (using Image Resizer) before or after compressing, since a gallery with wildly inconsistent image dimensions can look unpolished even if every individual image is well-compressed. A common workflow is: resize all images to a consistent maximum dimension first, then bulk-compress the resized versions — this often achieves smaller file sizes than compressing at full original resolution, since there's simply less image data to compress.
If you need fine control over the compression level for a single important image — say, a hero image for a website — our Image Compressor lets you fine-tune settings for that one file. This bulk tool applies a consistent setting across many images at once, prioritising convenience and consistency over per-image customisation — ideal when you have a large batch and want a quick, uniform result rather than adjusting each image individually.
There's no fixed limit, though processing many large images at once depends on your device's available memory, since everything happens in your browser.
This tool applies consistent settings across the batch for simplicity. For per-image control, use our Image Compressor individually for images that need different treatment.
All compressed images are packaged together into a single ZIP file, which can be extracted using standard tools on any operating system.
Generally yes, the original filenames are retained for the compressed versions inside the ZIP, making it easy to match files to their originals.
No, all compression happens locally in your browser, regardless of how many images you process.