Image Format Converter
PopularConvert between PNG, JPEG, WebP, AVIF, BMP, HEIC and SVG raster output.
Input
Settings
Run
Results
Results will appear here once you run the tool.
About Image Format Converter
Image Converter moves pictures between PNG, JPEG, WebP, AVIF and BMP, and reads HEIC and SVG as inputs. The two conversions people arrive here for are HEIC to JPEG and anything to WebP.
HEIC is why most people come. iPhones save photos as HEIC by default, and a great deal of software still cannot open them — Windows without a paid codec, older Office, plenty of upload forms. Converting to JPEG or PNG makes the photo work everywhere.
Choosing a target format. WebP and AVIF are dramatically smaller than JPEG at matching quality and are supported everywhere current; use them for the web. JPEG is the safe choice for anything being sent to someone else or into old software. PNG is for screenshots, diagrams, logos and anything needing transparency. BMP is uncompressed and enormous, and exists here for the rare bit of software that insists on it.
Some conversions lose things, permanently. Moving to JPEG discards transparency, so set the fill colour first. Converting a lossy image to PNG does not restore quality that was already thrown away — it just stores the existing pixels losslessly in a bigger file. And every lossy re-encode degrades the picture a little further, so convert from your original rather than from a converted copy.
SVG rasterises at whatever width you set. That is a one-way trip: the result is pixels, and scaling it back up will not be sharp. Keep the SVG.
How to use Image Format Converter
- Add your images. Drop in up to 100 files. HEIC from an iPhone and SVG both work as inputs.
- Choose the output format. JPEG for compatibility, WebP or AVIF for small web files, PNG for transparency and sharp edges, BMP only if some old software demands it.
- Handle transparency. If you are converting to JPEG, set the background colour first — JPEG cannot store transparency and will fill it with whatever you choose.
- Convert and download. Press Run. Converting several files gives you a ZIP.
Frequently asked questions
Which format should I choose?
WebP is the best default: noticeably smaller than JPEG at the same quality and supported everywhere current. Use JPEG for maximum compatibility, PNG when you need transparency or perfectly sharp edges, and AVIF for the smallest files if your audience is on recent browsers.
Why does AVIF sometimes fail?
Not every browser can encode AVIF. Rather than silently saving a PNG and misleading you, the tool checks first and tells you to pick another format.
Are my files uploaded when I use Image Format Converter?
No. Image Format Converter runs entirely inside your browser. Your file is read locally, processed on your own device, and handed straight back to you. You can confirm this yourself: open your browser's developer tools, watch the Network tab, and run the tool — no request carries your data anywhere.
Is Image Format Converter free?
Yes, completely. No account, no sign-up, no watermark on your output, and no cap on how many times you can use it. The project is open source under the AGPL licence.
Is there a file size limit?
There is no server limit, because nothing is uploaded. The practical ceiling is your device's memory — on a modern laptop, files up to a few hundred megabytes are comfortable, while phones handle less. If a tab becomes unresponsive, the file was too large for the memory available.
Can I process several files at once with Image Format Converter?
Yes — up to 100 at a time. When there are more than a few results they are packaged into a ZIP so you get everything in one download.
Does Image Format Converter work offline?
Mostly. The site caches itself after your first visit, so it keeps working without a connection. Tools that need a specialised library — PDF editing, OCR, QR codes, MP3 encoding — need a connection the first time you run them, then that library is cached too.