Image format converter
Pick the output format, drop in your images and convert them in bulk. Transparent PNGs converted to JPG get filled with the background colour you choose.
Upload and process
Runs locallyHow to use it
- Choose the format you need: JPG, PNG or WebP.
- For JPG output, pick a background colour for transparent areas (white by default).
- Upload one or many images — mixed formats are fine.
- Adjust the output quality if sharpness matters to you.
- Click convert, then download individually or as one ZIP.
When this tool helps
Format incompatibility is the most common tiny annoyance in everyday work: a screenshot saved as PNG when only JPG is accepted, a designer's WebP file that older software refuses to open, a form that only takes JPEG. This tool does the whole batch at once, and because it runs locally you never fight upload limits or wait for a server. Transparency is handled explicitly, too — JPG has no alpha channel, so transparent pixels get filled with a colour of your choosing instead of turning black.
FAQ
Will converting reduce quality?
PNG to JPG and back re-encodes the image, so there is a small loss rather than none. Keeping quality at 90 or above is visually indistinguishable for most photos.
Why did my transparent PNG turn white?
JPG cannot store transparency, so transparent pixels must be filled. White is the default fill; you can change it in the options. Choose PNG or WebP output to keep transparency.
Do you support HEIC?
That depends on your browser. Safari on Apple devices can decode HEIC; some desktop browsers cannot. If decoding is unsupported the page tells you clearly instead of producing a broken file.
Can I convert many images at once?
Yes. Around 40 images per batch and 30MB per file keeps things smooth, because conversion runs one image at a time.
Are my files uploaded?
No. Conversion happens in your browser and your images never leave your device.
Related tools
Compress image to a target size
Compress images to an exact target size in KB. Supports JPG, PNG and WebP, works in batches, and never uploads your files — everything runs locally in your browser.
Most usedResize and crop images
Resize images by pixels or percentage, or crop them to an exact size such as 800x800. Batch processing, no uploads, runs in your browser.
Batch watermark images
Add text watermarks to many images at once with nine positions, tiled coverage, adjustable opacity and size. No uploads, everything runs locally.