Format Converter
Convert between PNG, JPG, and WebP formats.
Convert images between PNG, JPG, and WebP. The converter respects transparency where supported, lets you set output quality for lossy formats, and works in your browser with zero uploads.
About the Format Converter
Choosing the right image format is one of the highest-impact decisions you make about an image. The format determines how the file is encoded, how big it ends up, whether it supports transparency, how widely it's supported by browsers and software, and how well it survives further editing. PNG, JPG, and WebP cover roughly 99% of practical use cases on the modern web, and each is optimized for a different kind of content.
JPG (or JPEG) is the workhorse format for photographs. It uses lossy compression that's very effective on photographic content with smooth tonal gradations — skies, skin, foliage — and produces small files at acceptable quality. JPG does not support transparency and is a poor choice for any image with sharp edges, text overlays, or solid-color regions, because the block-based compression introduces ringing artifacts around high-contrast edges. It's the safest format for anything that needs maximum compatibility: every device, every email client, every CMS handles JPG without thinking.
PNG is the right format for screenshots, UI mockups, logos, icons, and any image with transparency or sharp edges. PNG uses lossless compression — it never throws pixels away — so it preserves crisp lines and exact colors perfectly. The trade-off is file size: PNG photos are typically two to five times larger than the same image as JPG. PNG also supports an alpha channel, which means you can have semi-transparent or fully-transparent pixels, something JPG cannot do.
WebP is the modern hybrid that does both. It offers a lossy mode that beats JPG by 25–35% at equivalent visual quality, and a lossless mode that beats PNG on file size for most content. It also supports transparency. Every current browser supports it, and most CDNs serve it transparently to clients that can handle it. The only situations where WebP still loses are workflows that haven't caught up — some older email clients, legacy enterprise software, certain print workflows — but for everything else, WebP is now the default.
Converting between these formats is straightforward, but a few gotchas are worth knowing. Converting from PNG to JPG flattens any transparency against a solid white background, because JPG has no alpha channel. Converting a JPG to PNG does not recover any of the data the JPG already lost — you'll just get a larger file with the same visual content. Converting from any lossy format to WebP at high quality is essentially free in terms of perceptual quality, and usually shrinks the file. The conversion runs entirely in your browser using the canvas API and standard encoders.
How to use the Format Converter
- 1
Add your images
Drop one or many images onto the converter. Source files can be any common web format your browser can decode.
- 2
Pick an output format
Choose PNG for transparency and lossless quality, JPG for the smallest files when transparency is not needed, or WebP for the best size-to-quality trade-off on modern browsers.
- 3
Set the quality (lossy formats)
For JPG and WebP, set the quality between 1 and 100. PNG ignores this setting because it is lossless.
- 4
Convert and download
Click Convert. Files are processed sequentially with a progress bar; download each one or use Download all.
Features
- Convert between PNG, JPG, and WebP
- Adjustable quality for JPG and WebP
- Preserves transparency when converting to PNG or WebP
- Batch conversion with per-file progress
- Side-by-side preview of source and result
- 100% client-side — no upload, no temporary files anywhere
Common use cases
- Convert legacy PNG screenshots to WebP for faster page loads
- Flatten transparent PNG logos to JPG for older systems
- Standardize a folder of mixed-format images to a single format
- Prepare assets for an iOS or Android app that only accepts one format
- Convert HEIC photos exported from iPhone to JPG or WebP
- Switch a product catalog from JPG to WebP for a measurable speed boost
Tips and best practices
Default to WebP on the modern web
Unless you have a specific compatibility requirement (some email systems, ancient CMSes), WebP is the right output for new web projects. It's smaller than JPG at the same quality and smaller than PNG for screenshots and graphics.
Keep originals when converting lossy → lossy
Converting JPG to WebP re-encodes the image, which compounds losses very slightly. The visible difference is usually undetectable, but if you'll need to re-export later, keep the original JPG (or even better, the pre-JPG source if you have it).
Use PNG for screenshots, JPG for photos
Screenshots have sharp edges and flat color regions that JPG handles poorly. Photos have continuous tones that PNG wastes bytes encoding losslessly. Picking the right format for the content makes a much bigger difference than tweaking quality settings.
Convert HEIC out of iPhone exports
iPhones save photos as HEIC by default. Many web tools and older platforms don't accept it. Converting HEIC to JPG or WebP makes the file portable everywhere.
Strip transparency intentionally
If you need to convert a transparent PNG into JPG, the transparent pixels become a solid background — usually white. That can be a feature (clean against any backdrop) or a bug (your floating logo now has a white halo). Decide before exporting which you want.
Technical details
WebP vs JPG: real-world differences
At quality 80, WebP files are typically 25–35% smaller than JPG files at the same perceptual quality. The difference is bigger for images with smooth color regions (skies, skin) and smaller for noisy, high-detail content (foliage, hair, textures). The trade-off is essentially zero on modern browsers, all of which support WebP natively.
PNG vs WebP for screenshots
Lossless WebP is usually 20–50% smaller than PNG for the same screenshot. Lossy WebP at quality 90+ is typically 5–10× smaller than PNG with no visible difference, because screenshots have a lot of solid-color regions that lossy encoders compress very effectively.
Why JPG should never be your archival format
JPG is a delivery format, not a storage format. Every save re-quantizes the file slightly. For archival, use a lossless format (PNG, TIFF, or your camera's RAW format) and export JPG or WebP only when you ship the image somewhere.
Frequently asked questions
Should I use WebP or JPG?
WebP produces 25–35% smaller files than JPG at the same visual quality, and every modern browser supports it. Choose JPG only if you need compatibility with very old software or systems that explicitly reject WebP.
What happens to a PNG's transparent background when I convert to JPG?
JPG does not support transparency, so transparent pixels are flattened against a solid white background. If you need to keep transparency, use WebP or stick with PNG.
Does WebP support animation?
WebP supports animation, but this converter outputs single-frame WebP only. For animated WebP or APNG, you will need a dedicated animation tool.
Can I convert HEIC files from my iPhone?
Yes, in any browser that supports HEIC decoding (recent Safari and Chrome do). If your browser can't decode HEIC, the file won't appear in the preview — in that case, use the Files app on iPhone to share an image as 'most compatible' which forces JPG export.
Will I lose quality converting JPG to PNG?
No additional quality will be lost in the conversion itself, but you also won't gain any back. The PNG will encode whatever the JPG already contained — including any artifacts the JPG already had. The PNG will simply be a larger file with the same visual content.
How does conversion handle color profiles?
Most browsers convert images to sRGB during canvas operations, which is what you want for the web. Embedded ICC profiles in the source may be discarded. For color-critical workflows (print, photography portfolios), use a desktop tool that respects ICC profiles end-to-end.
Why does my converted WebP look identical to my source PNG?
That's the goal. WebP at quality 90+ is visually indistinguishable from a lossless source for most content, while being much smaller. If you genuinely need bit-exact pixel preservation, use lossless WebP (toggle the format settings) or stay on PNG.