Bulk Resize Photos
bulkresizephotos.com
Resizes hundreds of photos at once without uploading any of them
No sign-upOn device
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Crop, compress, upscale, restore and clean up pictures.
bulkresizephotos.com
Resizes hundreds of photos at once without uploading any of them
cleanup.pictures
Paint over an object in a photo and it fills in what was behind it
ezgif.com
Makes, crops, speeds up and optimises animated GIFs and short clips
iloveimg.com
Batch resize, crop, compress and watermark a folder of images
myheritage.com
Sharpens the blurred faces in an old family photograph
palette.fm
Colourises a black-and-white photo and lets you steer the colours
photopea.com
Opens a PSD, keeps the layers, and runs entirely in a browser tab
pixlr.com
The 2008 browser photo editor, now split into a simple and an advanced one
remove.bg
Cuts the background out of a photo in one click
screely.app
Wraps a raw screenshot in a browser frame and a decent background
squoosh.app
Compare image compression settings side by side before you export
tinypng.com
Shrinks PNG and JPEG files by half with no visible difference
upscale.media
Enlarges a small image 2x, 4x or 8x without it turning to mush
Privacy
These process everything inside the browser. Load the page, disconnect from the network, and they still work.
bulkresizephotos.com
Resizes hundreds of photos at once without uploading any of them
photopea.com
Opens a PSD, keeps the layers, and runs entirely in a browser tab
screely.app
Wraps a raw screenshot in a browser frame and a decent background
squoosh.app
Compare image compression settings side by side before you export
By task
Archive
Kept on record so an old bookmark still leads to an answer. Each one names the site that does the job now.
Questions
There is no single answer, which is why this page lists 13 of them with their limits stated. If you want to avoid signing up entirely, 6 of these work with no account at all.
4 of the 13 sites here process your file inside the browser and never upload it — they are marked "On device". The rest send your input to their server, which is fine for public material and worth thinking twice about for anything personal.
Some already have. 2 entries in this category has been retired and moved to the Archive with a working successor, so an old bookmark still leads somewhere useful.