Image Resizer

Drop in any number of JPGs, PNGs or WebP files, pick how long the longest side should be, and download them resized. Everything happens inside your browser using your own computer, so the pictures are never uploaded, never stored, and never seen by anyone but you.

How it works

Image Resizer is a web page that does its work on your own device. The file you choose is opened by your browser, changed there and saved from there; it is never sent to a server, so there is no copy of it anywhere to delete, no queue and no waiting for an upload. Most online tools of this kind send your file to their servers and work on it there, and many keep it for a while. This one does not. There is no account, no watermark and no limit on how often you use it, and the result downloads the moment it is ready.

Straight to one job

Image Size Converter

How to pick a size

Most people resize to whatever number they have heard repeated, and end up either with soft pictures or with 8 MB files that take a minute to upload. The measurement that matters is the longest side, because that is what marketplaces and content systems actually check.

• 2000 px suits Etsy, eBay and most marketplace listings. It gives the zoom view enough detail without wasting upload time.
• 1200 px is plenty for a page on your own website. Above that you are mostly paying for pixels nobody sees.
• 600 px suits thumbnails, email, and anywhere the image appears small.

Quality, and how far to push it

JPG and WebP both discard detail to save space, and the quality slider decides how much. Around 80 is the sweet spot: files are often a third of the size with no difference most people can see. Below about 60 you start to get blocky patches in skies and flat backgrounds, which is exactly where a product photo starts to look cheap. PNG does not work this way — it keeps every pixel exactly, which is why the slider disappears when you choose it.

Why it runs in your browser

Every mainstream browser can already decode, resize and re-encode an image. Sending your photographs to a server to do the same work means waiting through two transfers and handing your files to someone else on the way. This tool skips both. That is also why it keeps working with the internet switched off once the page has loaded.

The trade-off, stated plainly: large batches are limited by your own computer's memory rather than by a server farm. A few dozen photographs at a time is comfortable; several hundred at once is not what this is for.

What it does

• Resize many images at once, with the originals left untouched
• Presets for Etsy listings, web pages and thumbnails
• Save as JPG, WebP or PNG, with a quality slider for the first two
• Shows the size saved on every file, before and after
• Never enlarges a small image, so nothing comes out blurry
• Keeps working offline once the page has loaded

Questions

Are my pictures uploaded anywhere?

No. The resizing is done by your own browser and the files never leave your computer. You can disconnect from the internet after the page loads and it still works.

What size should Etsy listing photos be?

Etsy recommends at least 2000 pixels on the shortest side for listing images, which is why 2000px is the first preset. Much larger than that mostly wastes upload time.

Why did my transparent PNG come out with a white background?

JPG cannot store transparency, so transparent areas are filled with white. Choose PNG or WebP instead if you need the transparency kept.

Which format should I pick?

JPG for photographs, which is what most marketplaces expect. WebP for the web when you want the same quality in a smaller file. PNG for logos, screenshots and anything with transparency or sharp text.

Can I make a small picture bigger?

Not with this tool. Enlarging an image cannot add detail that was never captured, so it only makes the picture look soft. Images already smaller than the size you ask for are left alone.

Can I resize a photo in KB or cm?

This tool resizes by pixels. To get a photo under a file size such as 50 KB, use Compress Image. For exam forms that fix both the pixel size and the KB range, use the Exam Photo and Signature Resizer.

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