Image Format Converter (PNG/JPG/WebP)
Free tool to convert images between PNG, JPG, and WebP formats. Adjust the output quality, with all conversion happening entirely in your browser — nothing is uploaded to a server.
Comparing supported formats
| Format | Compression | Transparency (alpha channel) | Output support |
|---|---|---|---|
| PNG | Lossless | Supported | Supported |
| JPG (JPEG) | Lossy | Not supported | Supported |
| WebP | Both lossless and lossy | Supported | Supported |
| GIF | Lossless (palette-based) | Supported (binary only) | Not supported (input only — first frame can be converted to another format) |
What is image format conversion?
This image format converter lets you switch between PNG, JPG, and WebP entirely inside your browser, with no upload to a server. It solves everyday problems — shrinking a photo before posting it to a blog, or turning a JPG into a transparent PNG when a logo needs a see-through background — the moment they come up, without installing any extra software. Because it relies on the browser's Canvas API, any modern browser can run the conversion on its own.
The right output format depends on what you need: image quality, file size, and transparency support all vary between formats. As a rule of thumb, convert photos to JPG or WebP to prioritize compression, and convert logos or icons that need transparency to PNG or WebP. The quality slider lets you fine-tune the trade-off between visual fidelity and file size until you find the setting that works for your use case.
How to convert an image
- Select an image Drag and drop a file onto the dropzone, or click it to choose a file from your device.
- Choose the output format Pick PNG, JPG, or WebP depending on what you need the result for.
- Adjust the quality (JPG and WebP only) Move the slider while watching the trade-off between visual quality and file size.
- Convert and download Click the button to run the conversion; the resulting file downloads automatically.
Tips for getting more out of it
- For JPG and WebP, lowering the quality slider shrinks the file size but also makes the image blockier. A value around 80 works well for photos, and 90+ for illustrations.
- Converting a transparent PNG to JPG fills the transparent areas with a background color (usually white), since JPG doesn't support an alpha channel. Use PNG or WebP if you need to keep transparency.
- WebP often produces a noticeably smaller file than PNG or JPG at a similar visual quality, which makes it a good choice for speeding up web page load times.
- If you upload a GIF, only its first frame gets converted — an animated GIF can't be saved as-is in another format through this tool.
- The converted file downloads automatically to your downloads folder. You can re-convert as many times as you like with a different format or quality.
When to use this converter
Speeding up a blog or online store
Convert product or article photos to WebP to shrink file size and improve page load speed.
Keeping transparency when changing formats
Preserve a logo or icon's transparent background by converting to PNG or WebP instead of JPG, which discards it.
Meeting upload or attachment restrictions
Switch formats when an upload form only accepts JPG, or when a strict file-size limit rules out your original format.
Modernizing old image files
Batch-convert legacy GIF images into the PNG or WebP formats that are more common today.
Image format glossary
- Lossless compression
- A compression method that lets the original data be fully reconstructed. PNG uses it, so there is no loss of image quality.
- Lossy compression
- A compression method that discards some information to shrink the file. JPG uses it, and quality drops as the compression ratio increases.
- Alpha channel (transparency)
- Per-pixel opacity data stored alongside color information. PNG and WebP support it, allowing a transparent background.
- Canvas API
- A browser JavaScript feature for drawing and manipulating images. This tool's conversion runs entirely on this API.
- WebP
- An image format developed by Google that supports both lossless and lossy compression, often producing smaller files than PNG or JPG at comparable quality.
Frequently asked questions
Side Note — why was WebP created?
Google introduced WebP in 2010, adapting the keyframe compression technology from its own VP8 video codec for use with still images. JPEG, the dominant format at the time, had been standardized back in 1992, and Google's bet was that the compression advances made for video encoding could squeeze out a noticeably smaller file at the same visual quality.
Early browser support was limited, which slowed adoption for years. That changed around 2020 when Safari and Edge finally added support, bringing WebP to virtually every modern browser. Since Google's search engine also factors page load speed into its ranking signals, switching images to WebP now carries real SEO weight too.
PNG, meanwhile, traces its origins to 1996, when the GIF format's patent controversy (a licensing dispute over the LZW compression algorithm held by Unisys) pushed the industry to develop a royalty-free lossless alternative. PNG achieved better compression than GIF while also supporting full 24-bit color instead of GIF's 256-color palette, plus an 8-bit alpha channel for smooth semi-transparency — which is why it remains a go-to format for logos, icons, and screenshots to this day.