Click to upload or drop many images
JPG, PNG, WebP, HEIC, AVIF, GIF, BMP or SVG — as many as you like. Nothing is uploaded.About the bulk image converter
Converting one image is easy. The trouble starts with a whole folder: 300 iPhone photos in HEIC that Windows will not open, a website full of PNGs that should be WebP, product shots that a shop only accepts as JPG.
This tool converts all of them in one go. Drop the files in, choose the format, press one button, and download a ZIP with every image converted. Each file keeps its own name — only the ending changes.
How to use it
- Click Click to upload, or drag a whole folder of images onto the box
- Choose the format: JPG, PNG, WebP or AVIF
- Set the quality (for JPG, WebP and AVIF) — 90 is a safe default
- Press Convert them all and watch the progress
- Click Download all (ZIP) — or save single images from the preview
Formats it reads and writes
In: JPG, PNG, WebP, HEIC / HEIF (iPhone photos), AVIF, GIF, BMP and SVG — and you can mix them in one batch.
Out:
- JPG — the safest choice for photos. Opens everywhere, small files
- PNG — lossless, keeps transparency. Best for logos, screenshots and graphics
- WebP — about 25–35% smaller than JPG at the same look. Made for websites
- AVIF — the smallest of all, often half the size of JPG. Supported by modern browsers; slower to make
Popular conversions
- PNG to JPG in bulk — make heavy screenshots and graphics small enough to email
- HEIC to JPG in bulk — open a whole iPhone camera roll on Windows or upload it anywhere
- WebP to JPG in bulk — turn images saved from websites into files every app opens
- JPG to WebP in bulk — speed up a website by shrinking every photo
- JPG to PNG in bulk — when a print shop or an editor asks for PNG
- Images to AVIF in bulk — the smallest files for a modern site
Transparency and quality
JPG has no transparency. When a transparent PNG becomes a JPG, the empty areas are filled with a colour — white by default, or any colour you pick.
PNG, WebP and AVIF keep transparency, so logos and icons stay see-through.
Quality controls the size of JPG, WebP and AVIF files. 90 looks the same as the original for almost any photo. 75–80 gives much smaller files for the web. PNG is lossless, so it has no quality setting.
Everything happens on your device
Your images are converted inside your browser. Nothing is uploaded, which means:
- Private — family photos, client work and documents never leave your computer
- Fast — no upload wait, even for hundreds of photos
- No limits from an upload cap, no sign-up and no watermark
HEIC and AVIF use small helper engines that download once, the first time you need them.
What people use it for
- Converting an iPhone photo library from HEIC to JPG
- Changing a website's images to WebP or AVIF for faster pages
- Turning screenshots (PNG) into small JPGs for a report or a ticket
- Getting product photos into the one format a marketplace accepts
- Making downloaded WebP images usable in Word, PowerPoint or an old editor
Frequently asked questions
How many images can I convert at once?
Up to 500 in one batch. For a bigger folder, run it in two or more batches.
Is the bulk image converter free?
Yes. There is no sign-up, no watermark and no daily limit.
Are my images uploaded to a server?
No. Every image is converted inside your browser, on your own device. Nothing is sent anywhere.
Can I convert HEIC photos from an iPhone in bulk?
Yes. Drop the HEIC files in and choose JPG. The HEIC decoder downloads once, the first time, and then converts the whole batch.
Will the file names stay the same?
Yes. Only the ending changes, for example holiday-01.png becomes holiday-01.jpg. If two files would end up with the same name, the second one gets a number added.
Why is AVIF slower than the other formats?
Browsers cannot write AVIF by themselves, so a separate encoder does the work. The files are the smallest you can get, but each one takes a moment longer.
Good to know
- Up to 500 images per batch
- Animated GIFs are converted as a still image (the first frame)
- Metadata such as EXIF and GPS is not copied to the new files — convenient for privacy
- The first 24 results are previewed; the ZIP always contains every image
- To change the size at the same time, use Bulk Image Resizer
Related tools
- Bulk Image Compressor — make many photos smaller
- Bulk Image Resizer — resize many images at once
- Bulk Watermark Images — put your logo on every photo
- HEIC to JPG — iPhone photos, with a quality setting
- PNG to JPG — one image, with a live preview
- ZIP and Unzip Files — open the ZIP on any device
