Image converter: JPG, PNG, WebP, BMP

An offline image converter for JPG, PNG, WebP and BMP that can also resize or compress to an exact KB size in the same step — nothing is uploaded.

Download for WindowsFree · Windows 10/11 · portable single .exe
  1. Download for Windows and run the .exe.
  2. Drag in the images you want to convert.
  3. Choose the output format: JPG, PNG, WebP or BMP.
  4. Optionally set a pixel size, cm + DPI, or a KB target at the same time.
  5. Save — the converted files stay on your computer.

Convert and resize in one offline step

Normally you'd convert the format on one site and resize on another. Here it's a single pass: pick the output format and, if you want, give it a pixel size or a KB target at the same time. A heavy PNG screenshot can come out as a JPG under 50 KB in one go.

It all runs locally, so there's no upload, no queue and no size limit from a web server — and documents with personal details never leave your PC.

Which format should you pick?

Each format is good at something different. Choose based on what the image is and where it's going — and note that a lot of government and exam portals specifically require JPG.

  • JPG — photos, and most passport/exam uploads; smallest files at a given quality
  • PNG — screenshots, logos and sharp text; keeps edges crisp but files are larger
  • WebP — smaller than JPG at similar quality, good for the web
  • BMP — uncompressed and large; only when a tool specifically asks for it

Converting for exam and passport uploads

The most common real-world need: a portal insists on JPG, but your photo is a PNG or a phone screenshot in another format. Convert it to JPG here and, in the same step, fit it to the portal's KB cap.

Remember that converting a PNG with sharp text to JPG can add faint fuzz around edges, and squeezing to a tiny KB target adds a little more. For a portrait photo that's fine; for a pure signature, start from a clean scan and keep the target no smaller than the portal demands. If your portal lists a limit that's not shown here, check your portal's exact requirement.

Frequently asked

Can I convert PNG to JPG offline?
Yes. Drop in the PNG, choose JPG as the output and save — it all happens on your PC with nothing uploaded.
Does the converter support WebP and BMP?
Yes — you can convert to and from JPG, PNG, WebP and BMP.
Can I convert and resize to a KB size at the same time?
Yes. Pick the output format and set a KB target (or pixel size) together, and it does both in one pass.
My exam wants JPG but my photo is a PNG — can this fix it?
Yes. Convert it to JPG and fit it under the portal's KB cap in the same step. Check your portal's exact requirement for the limit.
Is the image converter free and offline?
Yes — free, portable, no account, and it runs entirely offline with no files uploaded.
Get it

Download Image Resizer PC

A single portable .exe — no installer, no .NET to set up. Free, offline, no account.

Windows 10 / 11 · 64-bitPortable single .exe~55 MBVersion 1.0.0
First run: because the app is new and not yet code-signed, Windows may show "Windows protected your PC." Click More info → Run anyway.