imgresizer.org

Convert to PNG

Convert any image to PNG - lossless, transparency preserved, optimised for the smallest possible file.

Your image is processed locally. Nothing is uploaded.

How to use Convert to PNG

  1. 1

    Upload your image

    Drop a JPG, WebP, GIF or BMP image onto the tool or click to select.

  2. 2

    Convert to PNG

    Click Convert to PNG. Transparency is preserved and the output is optimised for the smallest possible lossless file.

  3. 3

    Download

    Download the .png file. The output is fully lossless - every pixel is identical to the source.

When to choose PNG over JPG

PNG is the right format when pixel accuracy matters more than file size. Screenshots always belong in PNG - the sharp edges of text and UI elements compress beautifully in PNG and would show block artefacts in JPG. Logos, icons, and illustrations with flat colours or fine lines look cleaner in PNG. Any image that needs a transparent background requires PNG or WebP, because JPG has no alpha channel.

For photographs and continuous-tone images, JPG or WebP will produce a much smaller file at comparable quality. PNG stores every pixel exactly, which means it cannot achieve the same compression ratios for complex photographic content. A 2 MB holiday photo converted to PNG might become 8-15 MB.

Why the PNG files are smaller

Standard browser-based PNG converters use a single fixed compression strategy and stop there. This tool runs multiple optimisation passes and keeps whichever produces the smallest file. The result is a PNG that can be 30-70% smaller than one exported from a typical browser tool, with zero change to the image pixels - every pixel is identical.

Editing workflow: why PNG preserves quality across saves

If you are editing an image through multiple steps - cropping, then adjusting colour, then adding text - each resave of a JPG re-encodes the image and introduces additional compression artefacts. PNG is lossless, so saving a PNG ten times produces an identical result to saving it once. For intermediate editing stages, PNG is the safest working format regardless of what you ultimately deliver.

Frequently Asked Questions

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