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Converts on your device — nothing is uploadedBatch Image Converter — Convert Multiple Images at Once
Converting images one at a time is tedious. This batch image converter takes a whole folder of pictures — JPG, PNG, WebP, AVIF, GIF, BMP and even HEIC from an iPhone — and converts them all to one format in a single pass. Everything runs inside your browser: nothing is uploaded, nothing is stored, and there is no limit on how many files you can process. Free, no sign-up, no watermark.
How to Batch Convert Images
- Upload — drag and drop all your images onto the drop zone (select them all in your file manager, or drag a whole selection at once). You can also click to browse or paste from the clipboard.
- Select the output — choose the format you want everything converted to: JPG, PNG, WebP or AVIF, and set the quality.
- Convert — press Convert. A progress bar tracks the batch and each row shows its new size and how much was saved.
- Download — grab any single file from its row, or press Download all for one ZIP containing everything.
No File Limit — and No Uploads
Most online batch converters cap free users at 20, 50 or 100 files, because every image has to travel to their servers and back. This one converts on your own machine, so there is no artificial cap — the practical limit is your device’s memory. Batches of 20–50 images are comfortable on a phone or laptop; a desktop handles far more. And because your files never leave your device, it is genuinely safe for personal photos, ID scans and client work.
Mixed Formats in One Batch
You don’t need to sort your files first. Drop JPGs from a camera, PNG screenshots, WebP downloads and HEIC photos from your phone all together, and they will all come out in the single format you chose. This is the fastest way to clean up a messy folder before uploading it somewhere that only accepts one format.
Which Output Format Should You Choose?
| Format | Best for | Transparency | Notes |
|---|---|---|---|
| JPG | Photos, universal sharing | No | Opens everywhere; transparency becomes white |
| PNG | Logos, screenshots, graphics | Yes | Lossless, but larger files |
| WebP | Websites, faster pages | Yes | Much smaller than JPG at similar quality |
| AVIF | Smallest possible web images | Yes | Best compression; slower to encode |
An honest note on browser support: creating WebP and AVIF files relies on your browser’s encoder, which currently means a Chromium-based browser such as Chrome or Edge. If your browser can’t produce the format you picked, the tool detects it and tells you straight away rather than handing you a mislabelled file. JPG and PNG output works everywhere.
Popular Uses
- iPhone photos to JPG — HEIC files won’t open on many websites and older Windows apps; convert a whole album at once.
- Website optimisation — convert a folder of JPG/PNG assets to WebP or AVIF for faster page loads and better Core Web Vitals.
- Product catalogues — make every listing image a consistent format before uploading to a marketplace.
- Screenshots for documents — turn a pile of PNG screenshots into JPGs that fit tighter upload limits.
- Consistent hand-offs — identical settings applied to every file, so nothing slips through in the wrong format.
Converting vs Compressing vs Resizing
These three jobs are easy to confuse. Converting (this page) changes the file format. Compressing keeps the format and shrinks the file size in KB. Resizing changes the pixel dimensions. They combine well: convert a folder to WebP here, then use the Image Compressor if you need an exact KB target, or the Image Resizer if the dimensions are wrong too.
Is It Safe and Private?
Yes. Every image is decoded and re-encoded locally in your browser, so your files are never uploaded, never copied to a remote server, and never stored after you close the tab. It is also faster than server-based tools, because there is no waiting for uploads or downloads.
Popular Batch Conversions — One-Click Pages
These dedicated pages open with the output format already selected — just drop your files and press Convert:
Batch HEIC to JPG (iPhone albums) · Bulk PNG to JPG · Bulk JPG to WebP (page speed) · Bulk PNG to WebP (keeps transparency) · Bulk JPG to PNG
Frequently Asked Questions
How do I convert multiple images at once?
Drop them all onto the upload area, pick the output format, press Convert, then download them individually or as one ZIP.
How many images can I convert at once?
There is no fixed limit — processing happens on your device, so your memory is the only constraint. Batches of 20–50 are comfortable on most machines.
Can I mix different input formats?
Yes — JPG, PNG, WebP, AVIF, GIF, BMP and HEIC can all go in the same batch and come out in one common format.
Can I batch convert HEIC photos from my iPhone?
Yes. HEIC and HEIF files are decoded in your browser, so a whole album can become JPG or PNG in one go.
Are my images uploaded to a server?
No. Everything is converted locally in your browser — your files never leave your device.
How do I download everything at once?
Press Download all and you’ll get a single ZIP archive containing every converted image.
Is it free?
Completely free — no sign-up, no watermark, no file-count limit.