Frequently asked questions

If something here contradicts what the tool does, the tool is right and this page is wrong — please say so.

Are my images uploaded anywhere?

No. Files are read from your device, processed by your browser, and saved back by you. There is no image server and no processing API. You can verify this in your browser's network panel while a batch runs.

How many images can I process at once?

There is no fixed cap, and there is no honest single number either. Batches of several hundred medium-resolution photos are routine on a modern laptop; very large images or a phone with limited memory will run into trouble sooner. Processing runs a few images at a time and reports any file that fails.

Which formats can I use?

JPEG, PNG, WebP and, in browsers that decode it, AVIF. GIF and BMP usually decode too, but only the first frame of an animation is used. Output is JPEG, PNG, WebP, and AVIF where your browser can encode it — the option is disabled when it cannot.

Can I resize without losing quality?

Making an image smaller always discards pixels, but done well the result is visually clean. Images are downscaled in stages rather than one jump, which avoids the jagged edges you get from a single large reduction. Enlarging is a different matter: no tool can invent detail that was never captured.

Do I need an account?

No. There is no sign-up, no login, and nothing to install. Your settings and saved presets are kept in your browser's local storage; your images are not stored at all.

Can I download everything at once?

Yes. Processed files can be downloaded individually, as a selection, or packaged into a single ZIP built in your browser. In browsers that support the File System Access API you can also write straight into a folder you choose.

What happens to my images when I close the tab?

They are gone. Files are held in memory for the session only. Nothing is written to local storage, IndexedDB, or a cache, so a refresh means starting again — which is also why nothing lingers.

What is DPI, and does changing it improve my image?

DPI describes how many pixels are packed into an inch of physical print. It tells a printer how large to print a given number of pixels. Changing DPI alone does not add detail; what matters is whether you have enough pixels for the size you want. A 4 × 6 inch print at 300 DPI needs 1200 × 1800 pixels.

Can I resize by percentage?

Yes. Choose percentage mode and enter any value, or use the 25%, 50%, 75% and 200% shortcuts. Both edges scale together, so the aspect ratio is preserved.

Can I convert PNG to JPEG?

Yes. Because JPEG has no alpha channel, transparent areas need a colour underneath them — white by default, changeable to any hex value. The choice is shown in the Format panel whenever it applies.

Is transparency preserved?

For PNG, WebP and AVIF output, yes. Padding and background areas use the colour you pick, and 'None' keeps them transparent in formats that support it.

Does processing remove EXIF and GPS data?

Yes, as a consequence of how the tool works. Each image is redrawn onto a canvas and re-encoded, which produces a file containing pixels and nothing else. Orientation is read first and baked in, so photos are not left rotated.

Does it work on a phone or tablet?

Yes, with the settings panel as a bottom sheet rather than a sidebar. Phones have far less memory than laptops, so keep batches modest and expect very large images to be the limiting factor.

Why is AVIF sometimes unavailable?

Encoding AVIF from a canvas is not supported in every browser. Rather than failing part-way through a batch, the option is tested at load and disabled when your browser cannot produce it.

Can I save my own preset sizes?

Yes. Save the current dimensions under any name in the Custom tab. Presets live in your browser's local storage, so they persist between visits on that device without an account.

Is it really free?

Yes, and there is nothing to upgrade to. Because your device does the processing, running the tool costs nothing per image — the site is static files.