CleanorTools
Formats

Image conversion

Details

How to use Image conversion

What the tool does, how to run it, and what to expect from the result.

How to convert an image format

To convert an image format, add your file to the image converter, choose the output you need such as PNG, JPG, WebP, GIF, or BMP, and download the converted result. The whole process happens in your browser, so the file is never sent to a server and there is nothing to install.

Common conversions are predictable: turn a PNG into JPG when file size matters more than transparency, export to WebP for lighter web delivery, or turn JPG, WebP, GIF, or BMP back into PNG when you want a clean, dependable result. The tool downloads the new file directly to your device.

  • PNG to JPG when file size matters more than transparency
  • JPG, GIF, BMP, or WebP to PNG for a cleaner, more predictable result
  • JPG or PNG to WebP for lightweight web delivery

Is the image converter free and private?

Yes. This image converter is completely free with no sign-up, no watermark, and no usage limits. It is funded as a free utility, so you can convert as many images as you need without paying.

It is also private by design. Because conversion runs client-side in your browser, your image stays on your device the entire time and is never uploaded to a server. That makes it safe for personal photos, ID scans, and work files you do not want leaving your computer.

Which formats convert cleanly, and which do not

The converter supports the formats browsers handle reliably: PNG, JPG, WebP, GIF, and BMP. Converting to JPG flattens transparency onto a background because JPG has no alpha channel, while PNG and WebP preserve transparency where the source has it.

HEIC and other camera-specific formats are better handled by a dedicated converter, because browser support for them is not consistent. For everyday web and document formats, browser-based conversion is faster, cheaper, and more private than uploading to a server.

Tips

Getting a better result out of Image conversion

Specific settings and thresholds, not general advice.

  • Pick the format by what the image IS, not by habit. Photographs want JPEG, WebP or AVIF; logos, screenshots and line art want PNG or SVG; anything with transparency rules out JPEG entirely.
  • AVIF is the biggest win where it is accepted: our benchmark measured it 37% smaller than JPEG at matched quality, and up to 52% on photographs. Browsers all take it; email clients and older software do not.
  • Converting a lossy file to a lossless one does nothing but grow it. JPG to PNG stores the artefacts perfectly and costs several times the size, with no visible improvement.
  • Converting to JPEG destroys transparency, silently. A logo that looked fine on a white page will show a white box the moment it lands on a coloured background.
  • Convert once, from the best source you have. Every lossy-to-lossy conversion costs a little, and a chain of them costs a lot.
Limits

What Image conversion does not do

The honest boundary, so you do not lose time finding it yourself.

  • It does not resize or crop.
  • It cannot recover quality a lossy source already lost.
  • It handles still images, not animations.
  • Converting to JPEG always flattens transparency.
Reference

Terms used on this page

Short, plain-language definitions for the formats and settings above.

Files & formatsWebPWebP (.webp) is a modern Google image format that supports both lossy and lossless compression, transparency, and animation in one file. It produces noticeably smaller files than JPEG or PNG at similar quality, so it is widely used on the web and increasingly on Android.GeneralAndroidEditing & toolsFile format conversionFile format conversion re-encodes a file from one type to another — for example HEIC to JPEG, PNG to WebP, or one color profile to another — so it opens where you need it. Conversion can change file size and compatibility, and it often strips metadata in the process.General
At a glance

Who Image conversion is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

People moving between phone photos, websites, forms, resumes, and social profiles

Ideal for

Quick exports between PNG, JPG, WebP, GIF, and BMP when another app or site expects a different format

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Is this image converter free?

Yes. This image converter is completely free to use with no sign-up, no watermark, and no limit on how many images you convert.

Does it upload my images to a server?

No. The image converter runs entirely in your browser, so your files stay on your device and are never uploaded anywhere.

Which formats can I convert between?

You can convert between PNG, JPG, WebP, GIF, and BMP, which covers the most common needs for websites, forms, and apps.

Why does my image lose transparency when I convert to JPG?

JPG does not support an alpha channel, so transparency is flattened onto a background. Convert to PNG or WebP instead if you need to keep transparency.

Does it work on mobile?

Yes. The converter works in any modern mobile or desktop browser, since all processing happens locally on your device.

Which image format should I use?

Photographs: JPEG, WebP or AVIF. Logos, screenshots and line art: PNG. Anything needing transparency: never JPEG. Where the destination accepts AVIF, it is the smallest of all: our benchmark measured 37% under JPEG at matched quality.

Does converting to PNG improve the quality?

No. PNG is lossless, so it stores exactly what it is given, including the artefacts a lossy source already had. You get a bigger file that looks identical.

What happens to transparency when I convert to JPG?

It is destroyed. JPEG has no alpha channel, so transparent areas are flattened, usually to white, and a logo that looked correct on a white page shows a box everywhere else.

Is AVIF ready to use?

In browsers, yes, universally. Outside them it is patchier: email clients and older desktop software still refuse it, so keep a JPEG or PNG fallback for anything that leaves the web.

Does converting between formats lose quality?

Between lossy formats, a little, every time. Convert once from the best source you have rather than through a chain of formats.

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Cleanor app

Do it all on your device

Cleanor puts these tools in one app: compress and convert images, video, and audio, work with PDFs, and scan text right on your device. Plus free up storage and clear inbox clutter with Email Cleaner. Start with a free trial.

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