Image Converter
Convert between PNG, JPG and WebP, with optional resizing and quality control. Your image never leaves your device.
Which format should you use?
| Format | Best for | Notes |
|---|---|---|
| WebP | Websites — photos and graphics | 25–35% smaller than JPG at the same quality; supported by all modern browsers |
| JPG | Photos for email, documents, universal compatibility | No transparency; quality 80–90% is the sweet spot |
| PNG | Screenshots, logos, anything needing transparency | Lossless — crisp but large for photos |
Why resize matters more than format
A 4,000-pixel-wide phone photo is wasted on a screen or web page displaying 800 pixels — it's 10–20× more data than needed. Setting max width to 1920 (full-screen) or 1200 (in-content) usually shrinks files far more than any format choice, with zero visible difference at display size.
Privacy note
Conversion happens with the HTML5 canvas API in your own browser — the image is never uploaded, so it's safe for IDs, documents and private photos. Bonus: canvas re-encoding strips EXIF metadata (GPS location, camera info) from the output, which is usually what you want when sharing publicly.
Sizes worth knowing
| Purpose | Max width | Format | Quality |
|---|---|---|---|
| Full-width web banner | 1920 px | WebP | 80–85% |
| In-article image | 1200 px | WebP | 80% |
| Product photo | 1000–1500 px | WebP or JPG | 85% |
| Email attachment | 1000 px | JPG | 75–80% |
| Logo or screenshot with text | Native | PNG | Lossless |
| Social profile picture | 800 px square | JPG | 85% |
The most common mistake is uploading straight from a phone. A modern phone photo is often 4,000 pixels wide and several megabytes; displayed in an 800-pixel column, more than 90% of that data is discarded by the browser after being downloaded. Resizing before upload is usually a bigger win than any format change.
Quality settings in practice
JPEG and WebP quality isn't a percentage of visual fidelity — it's a compression aggressiveness dial. Between 100% and 85% most images look identical while the file often halves. Below about 70% you start seeing blocky artefacts around sharp edges and text. 80–85% is the sweet spot for photographs; illustrations with flat colour and hard edges do better as PNG.
One warning: each re-encode of a lossy format loses a little more detail permanently. Editing a JPG repeatedly degrades it visibly over time. Keep your original file and export from it each time rather than re-editing the export.
A privacy side-effect worth having
Photos carry EXIF metadata — camera model, settings, timestamp, and often precise GPS coordinates of where the shot was taken. Posting an unedited phone photo can publish your home address without you realising. Because this tool redraws the image through a canvas, that metadata is stripped from the output automatically. If you're sharing photos publicly, converting them here removes location data as a matter of course.