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ScanMaster

Sharpen Image

Crisper edges and fine detail through an unsharp mask.

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About Sharpen Image

When the task is editing a picture one job at a time, Sharpen Image does it on the page you are already on — no upload, no queue. Crisper edges and fine detail through an unsharp mask. It takes JPG, JPEG, PNG and 9 more and produces JPG, JPEG, PNG, WEBP. Files up to 100 MB each, 50 at a time, and the work happens on your own machine rather than on a server.

Useful when the job is editing a picture one job at a time and you would rather not install software, join a queue or hand the file to a stranger.

How to use Sharpen Image in 3 steps

  1. Drop the picture on the page — JPG, JPEG, PNG and 9 more, up to 50 at a time.
  2. Set the output format and Quality; the sharpening itself is applied in one pass.
  3. Press Apply Sharpen and download the result in whichever of JPG, JPEG, PNG, WEBP suits you.

What you get with Sharpen Image

  • Accepts JPG, JPEG, PNG and 9 more in one go
  • Output in JPG, JPEG, PNG, WEBP
  • Batch up to 50 files, returned together
  • Runs in your browser — the file is never uploaded
  • Free to use, with no signup and no account
  • No watermark or logo added to your output
  • Works on desktop and mobile, no install

Sharpen Image: questions

Which file types does Sharpen Image accept?
The drop area takes JPG, JPEG, PNG and 9 more. Files are read from your device in the browser, so the format has to be one a browser can decode — that is why the accepted list on this page is finite and honest rather than "everything".
What do I get back from Sharpen Image?
The result is JPG, JPEG, PNG, WEBP, offered as a download the moment the work finishes. Multiple results come back together rather than as fifty separate save dialogs.
Is there a file size limit?
A single file may be up to 100 MB, and a batch up to 50 files. Those are guardrails rather than a paid tier — the work happens on your machine, so an enormous document is limited by your own memory before it is limited by us.
Is it safe to use for a document with personal details in it?
That is the design goal: the document stays on your device, so a statement, a contract or an ID photo is never transmitted for processing. Nothing here needs an internet connection once the page has loaded, apart from engines that fetch their own model data.