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Image Format Converter

Convert photos between PNG, JPG, WEBP and BMP formats without losing quality.

Private Instant No sign-up No daily limit

Free to use. No account, no daily limit, and no watermark on the result.

 Convert an image format

PNG · JPG · WEBP · BMP
Drop an image here, or click to choose a file PNG, JPG, WEBP or BMP — converted locally, nothing is uploaded

No picture loaded yet. Add an image, pick the target format and the converted file is ready in a second.

Source image

Source image preview

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Converted result

Converted image preview

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Target format

Selected quality: 0.90

JPG and BMP cannot store transparency, so transparent pixels are filled with this colour.

Source size
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Converted size
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Target format
PNG
Dimensions
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Waiting for an image…
Private by design. Every conversion is executed by your own browser using the Canvas API and a hand-written BMP encoder. Your picture never touches a server and no watermark is added.

How to convert an image format

1

Upload the source picture

Drop a PNG, JPG, WEBP or BMP file into the upload area, or click it to open the file browser.

2

Pick the target format

Choose PNG for lossless quality and transparency, JPG for small universal photos, WEBP for the best compression or BMP for legacy software.

3

Set quality and background

Tune the quality slider for JPG and WEBP output and choose the colour that replaces transparent areas in formats that cannot store alpha.

4

Download the result

The converted preview and the exact file size are shown live — press the download button to save it with a matching extension.

Image format converter — frequently asked questions

PNG is lossless and supports transparency, so it is the safest choice for logos, screenshots and graphics. JPG gives the smallest files for ordinary photographs. WEBP usually beats JPG by 25–35% at the same visual quality and is supported by every modern browser. BMP is uncompressed and mainly useful for legacy Windows software.

JPG has no alpha channel, so transparent pixels are filled with the background colour you choose in the “Background colour” dropdown — white by default. The same rule applies to BMP, which is written as 24-bit uncompressed pixels.

Yes. The tool writes a genuine 54-byte BITMAPFILEHEADER, a 40-byte BITMAPINFOHEADER and bottom-up 24-bit BGR rows padded to a 4-byte boundary, exactly as a classic uncompressed Windows bitmap.

No watermarks, no metadata stripping surprises and no quality loss beyond the setting you choose. The output pixel dimensions always match the source picture.

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