Image Converter (PNG, JPG, WebP)
Convert images between PNG, JPG and WebP with adjustable quality — entirely in your browser, nothing is uploaded anywhere.
How it works
Choose the output format (JPG, PNG or WebP), adjust the quality slider for lossy formats, pick an image, and download the result. The conversion runs entirely on your device using the browser's canvas engine — the file is never uploaded to a server, which makes the tool both fast and private, and means it works for sensitive images too.
Format notes handled for you: JPG has no transparency, so transparent areas are composited onto a white background instead of turning black; PNG is lossless, so the quality slider only applies to JPG and WebP. Files up to 25 MB are accepted, and most common input formats work (PNG, JPG, WebP, GIF, BMP — whatever your browser can decode).
When to use
Converting a PNG screenshot to JPG to meet an upload size limit; turning photos into WebP for a faster website (WebP is typically 25–35% smaller than JPG at similar quality); converting a WebP saved from the web into PNG/JPG for apps that don't accept it; or flattening a transparent logo onto white for a document.
Because nothing leaves your machine, it's also the right choice for documents, IDs, medical images, or anything you wouldn't paste into a random "free converter" site.
Practical examples
Screenshot too large to upload
A 4.2 MB PNG screenshot converted to JPG at 85% quality typically lands under 500 KB — small enough for e-mail attachments and form uploads, with no visible quality loss for screen content.
Faster images for a website
Product photos in JPG converted to WebP at 80% usually shrink by a quarter to a third, directly improving page load time and Core Web Vitals.
Common mistakes
Converting to PNG expecting a smaller file: PNG is lossless and often larger than the JPG you started with, especially for photos. PNG wins for screenshots, flat graphics, and anything needing transparency; JPG/WebP win for photographs.
The other one-way street is quality: converting a low-quality JPG to PNG doesn't recover detail that was already discarded. Keep originals when you can, and convert from the best source available.
Frequently asked questions
Is my image uploaded to a server?
No. The conversion uses your browser’s canvas API and happens entirely on your device. You can even disconnect from the internet after the page loads and it still works.
Which format should I choose?
Photos: JPG (universal) or WebP (smaller, modern). Screenshots, logos and graphics with text or sharp edges: PNG. Need transparency: PNG or WebP — JPG doesn’t support it.
What does the quality slider do?
It controls lossy compression for JPG and WebP: higher quality = larger file. 80–90% is visually indistinguishable from the original for most photos. PNG ignores the slider because it’s lossless.
What happens to transparency when converting to JPG?
JPG has no alpha channel, so transparent pixels must become a solid color. This converter composites them onto white — the usual expectation for documents and printing.
Can I convert HEIC photos from an iPhone?
Only if your browser can decode HEIC (Safari can; most others can’t). If the conversion fails, export the photo as JPG from your device first.