iLoveIMG
iloveimg.com
Batch resize, crop, compress and watermark a folder of images
Free tier
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ezgif.com
Makes, crops, speeds up and optimises animated GIFs and short clips.
The workshop for animated images: build a GIF from frames or from a video, crop it, change the frame rate, add text, reverse it, and cut the palette down until it fits a size budget. It also handles WebP and APNG and a surprising amount of plain video trimming. The interface has not changed since about 2013 and does not need to.
AltFTool does this too
If you would rather not leave the site, GIF Palette Optimizer covers the same job here — free, no account, and it runs in your browser.
Open GIF Palette OptimizerQuestions
Works the moment the page loads. No account, no email, no trial. Uploads are capped in the tens of megabytes, so a long clip has to be trimmed somewhere else first.
Yes. EZGIF sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Uploads are capped in the tens of megabytes, so a long clip has to be trimmed somewhere else first.
Alternatives
Same category or same task, ordered by how closely they overlap.
iloveimg.com
Batch resize, crop, compress and watermark a folder of images
squoosh.app
Compare image compression settings side by side before you export
bulkresizephotos.com
Resizes hundreds of photos at once without uploading any of them
tinypng.com
Shrinks PNG and JPEG files by half with no visible difference
tools.pdf24.org
Around thirty free PDF tools with no account and no daily counter
photopea.com
Opens a PSD, keeps the layers, and runs entirely in a browser tab