How do I convert many images at once?

Add all your files to the drop zone, choose a single target format such as WebP, then press Convert. Every image in the queue is re-encoded with the same settings, and you can download the whole batch as one zip file. There is no per-file limit other than your device's memory.

Which formats can I convert between?

The tool reads any format your browser can decode (PNG, JPEG, WebP, GIF, BMP and usually AVIF) and writes to WebP, JPG or PNG. WebP usually gives the smallest files at the same visual quality, JPG is best for photos where universal support matters, and PNG is lossless for graphics with sharp edges or transparency.

Will converting to WebP make my images smaller?

Almost always. WebP typically cuts photo file sizes by 25 to 35 percent versus JPEG and far more versus PNG, at a comparable quality setting. The savings bar shows the exact total size before and after so you can confirm the reduction for your specific images.

What happens to transparency when I convert to JPG?

JPEG cannot store transparency, so any transparent pixels are flattened onto a background colour you choose (white by default). For images that must keep transparency, convert to WebP or PNG instead, both of which preserve the alpha channel.

Are my images uploaded to a server?

No. Decoding, resizing, re-encoding and zipping all happen locally using the browser's canvas and an in-page zip library. Your photos never leave your device, which is why the tool also works offline once the page has loaded.

Does converting remove EXIF and location metadata?

Yes. Because each image is redrawn through an HTML canvas before encoding, EXIF data such as GPS location, camera model and timestamps is stripped from the output. That is convenient for privacy, but keep an original copy if you need that metadata later.

Batch Image Converter

A batch image converter that turns a whole folder of pictures into one consistent format in a single pass. Drop in dozens of PNG, JPEG, WebP, GIF, BMP or AVIF files, choose WebP, JPG or PNG as the target, tune the quality and optional resizing, then download every result as a single zip. It is built for anyone preparing images for a website, compressing a camera dump before sharing, standardising assets for an app, or simply shrinking a pile of screenshots — without installing software or uploading anything.

How it works

Each file you add becomes a job in a queue. When you press Convert, the tool decodes every image into an off-screen <img>, draws it onto an HTML canvas at the requested dimensions, and re-encodes it with the browser’s native encoder via canvas.toBlob(). For lossy targets (WebP and JPEG) the quality slider maps to the encoder’s quality parameter; PNG is always lossless. If you cap the longest side, the tool scales each image proportionally with high-quality smoothing so aspect ratios are preserved and nothing is stretched.

Because JPEG has no alpha channel, any transparent areas are first flattened onto a background colour you pick. Once all jobs finish, the converted blobs are bundled with an in-browser zip library (DEFLATE compression) so you get one tidy download named after the format and count. Duplicate output names are automatically suffixed so nothing is overwritten. The whole pipeline — decode, resize, encode, zip — runs entirely on your device: no network request is ever made, which is why it keeps working even with your connection switched off.

The running savings bar sums the input bytes against the output bytes so you can immediately see how much smaller the batch became. Per-image rows show the original and new dimensions plus the size delta as a percentage, making it obvious which files compressed well and which did not.

Example

Suppose you export 40 product photos from a camera as JPEGs, each around 4.2 MB at 6000×4000 pixels — roughly 168 MB in total. Set the target to WebP, quality 80, and the longest side to 1920px for the web. After converting, each image lands near 280 KB at 1920×1280, so the whole batch is about 11 MB — a reduction of well over 90 percent — and downloads as a single converted-webp-40-images.zip. The same 40 files sent to PNG instead would stay large because PNG is lossless, which the savings bar makes obvious at a glance, helping you choose the right format for the job.

Target	Quality	Best for	Transparency
WebP	75–85	Smallest web images	Preserved
JPG	80–90	Photos, universal support	Flattened to colour
PNG	lossless	Logos, screenshots, sharp edges	Preserved

Every byte is processed locally in your browser — no images are uploaded, stored or shared.