Image Converter
Convert JPG, PNG, WebP, AVIF, HEIC and more between formats without uploading anything. Set the quality, pick a background for formats that cannot store transparency, and convert up to 40 images at once.
Drop your images here
or browse from your device
JPG, PNG, WebP, AVIF, GIF and HEIC · up to 40 images · max 40.0 MB each
How to convert an image format online
Add your images
Drag in up to 40 images, or click to browse. JPG, PNG, WebP, AVIF, GIF and HEIC from an iPhone are all accepted, and nothing is uploaded.
Choose the output format
Pick what you want out. Only the formats your browser can genuinely write are listed, so you never choose one that quietly fails on every file.
Set quality and background
JPG, WebP and AVIF get a quality slider. For formats that cannot store transparency, choose the colour that replaces transparent areas instead of letting them turn black.
Convert and download
Every row shows the original and new size with the percentage saved. Download images one at a time, or take the whole batch as a ZIP.
Which format should you convert to?
Most people convert for one of three reasons: a file is too big, something will not accept the format, or transparency is being lost. The right target differs for each.
| What you need | Convert to |
|---|---|
| Smaller files for a website | WebP — usually 25–35% smaller than JPG |
| Maximum compatibility anywhere | JPG for photos, PNG for graphics |
| Keep a transparent background | PNG or WebP — never JPG |
| The smallest file that still looks good | AVIF, where your browser supports writing it |
| A photo from an iPhone that nothing will open | JPG or WebP — HEIC is decoded for you |
| Screenshots, logos and line art | PNG, so edges stay crisp |
| A print-ready file | PNG, or JPG at 95% quality |
Frequently asked questions
Does converting an image reduce its quality?
It depends on the target. PNG is lossless, so nothing is lost. JPG, WebP and AVIF re-encode the image, and you control how much with the quality slider — 90% is visually identical to the original for photographs. Converting a JPG to PNG will not restore detail the JPG already discarded.
Can I convert HEIC photos from my iPhone?
Yes, as long as your browser can decode HEIC — Safari and recent versions of Chrome and Edge on macOS can. Drop the file in and convert it to JPG or WebP. If your browser cannot read it, the row says so rather than producing a broken file.
Why has AVIF or BMP disappeared from the list?
Because your browser cannot write that format. Browsers accept an unknown format and quietly hand back a PNG instead, so the tool tests each encoder once and only offers what actually works. Chrome and Edge generally write AVIF; Safari and Firefox often do not.
What happens to transparency when I convert to JPG?
JPG has no alpha channel, so transparent areas must be filled with something. Choose the background colour in the panel — white by default. Without that, transparent pixels typically come out black.
Is there a limit on how many images I can convert?
Up to 40 images at a time, each up to 40 MB. There is no daily cap and no signup, because the work happens on your own device rather than on a server.
Are my images uploaded to a server?
No. Everything runs in your browser. Your images never leave your device, are never stored, and no watermark is added.