ZipMyImages manages 5 data types including jobs. Helps you organize, track, and share your work in 1 place for teams and solo users.

Is ZipMyImages really free?

Yes, the whole tool is free. There is no subscription, no paid tier and nothing to buy. Compression runs on your own computer, so we pay nothing for processing and have no reason to charge for it.

Are my images uploaded to a server?

No. Your images stay on your device. Compression, conversion and resizing all run inside the browser tab using the Canvas API and a WebAssembly JPEG encoder, so we never receive the files and cannot see them.

What image formats are supported?

ZipMyImages supports JPEG, PNG, WebP, AVIF, TIFF, GIF, and SVG as input formats. Output formats are JPEG, PNG, WebP, and AVIF (or keep the original format). TIFF and GIF are rasterized via Canvas during processing (GIF uses the first frame only). SVG files are minified when kept as SVG, or rasterized when converting to a pixel format.

How many files can I optimize at once?

Guests can compress 50 files per session, up to 5 MB each and 100 files a day. Logging in with a free account removes all three limits: any number of files per batch, any file size and no daily cap. Processing still happens locally in your browser either way.

Is it really unlimited after login? What is the catch?

There is no catch. Logging in is free, removes every limit and unlocks saved presets; there is no paid tier to upgrade to. The only real ceiling is your own hardware, because huge batches and very large photos use your RAM and CPU rather than a server.

What is visually lossless mode?

Visually lossless compression throws away data your eyes cannot resolve, so the picture looks the same on screen while the file gets much smaller. It is the mode to use for websites. Lossless mode keeps every pixel exactly as it was, which is safer for graphics and archives but saves far less space.

Does resizing preserve the aspect ratio?

Yes, always. Every resize mode, whether by long side, short side, megapixels or fit box, scales the image proportionally, so nothing is stretched or squashed.

What happens to EXIF metadata and color profiles?

Both are removed. Re-encoding an image in the browser drops EXIF, IPTC and XMP tags along with the embedded ICC profile, which means GPS coordinates, camera model and shooting settings do not travel with the file. Colors are written as sRGB, so they look the same in every browser, and the smaller header shaves a little off the file size.

Can I convert transparent PNGs to JPEG?

Yes. JPEG has no alpha channel, so transparent areas are filled with a background color that you choose before processing. White (#FFFFFF) is used by default.

Should I use WebP or AVIF?

Both are encoded locally, with nothing uploaded. WebP is the sensible default: it encodes quickly and every modern browser supports it. AVIF goes further, typically 20 to 40 percent smaller than WebP at the same visual quality, but it encodes noticeably slower on big batches and high-resolution photos. Choose WebP for speed and compatibility, AVIF when the smallest possible file matters most, or export both at once with Multi-Output.

Why does optimization take longer on some files?

Speed depends on the image resolution and your processor. A 20-megapixel photo has far more pixels to decode and re-encode than a web-sized one, and there is no server doing the work for you, so heavy files simply take more time.

How do I download my optimized images?

When the batch finishes, press DOWNLOAD ZIP. Every optimized image is packed into one ZIP archive and saved straight to your device. In Multi-Output mode each format gets its own folder inside the archive.

What is the Batch Rename feature?

Batch Rename applies one naming pattern to every output file, with your own prefix, suffix, separator and sequential numbering. It is handy for product catalogues, client deliverables and anything that needs predictable file names.

Does ZipMyImages work on mobile?

Yes, the tool works in mobile browsers and the layout adapts to small screens. Phones have less memory than laptops, so for very large batches or high-resolution photos a desktop browser will finish faster.

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FAQ

Answers about compressing, converting and resizing images in your browser

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