Beyond the Windows Photos App — Batch Compress a Whole Folder
The built-in Windows Photos app isn't built for bulk compression or format conversion. TinyPixels compresses entire folders locally on Windows, with WebP and AVIF conversion included.
How to batch compress photos on Windows
Download and open TinyPixels for Windows
Free to install — no account needed to start compressing.
Drop your photo folder in
Compress an entire library instead of resizing one photo at a time.
Choose WebP or AVIF if desired
Convert format alongside compression in the same pass.
Compress and collect the output
Every image processes locally — nothing leaves your PC.
Windows Photos is a viewer, not a compressor
The Windows Photos app handles viewing, basic cropping, and light editing well. It's not designed for the specific task of batch-compressing a folder of images or converting them to a smaller, web-friendly format.
For anyone who regularly needs to shrink photos before emailing, uploading, or archiving — designers, photographers, or anyone managing a large image library on Windows — a dedicated batch tool saves real time over handling files individually.
Batch folder compression
Drop an entire folder and compress every image in one pass.
Format conversion included
Convert to WebP or AVIF, not just resize the original format.
Folder watch automation
Auto-compress new files the moment they land in a watched folder.
No upload, fully local
Everything runs on your Windows PC — no internet connection needed.
What Windows does offer, and where it stops
Windows isn't entirely without batch tools — PowerToys' Image Resizer, if installed, adds a right-click "Resize pictures" option in File Explorer that can bulk-resize dimensions across a folder selection. It's a genuinely useful add-on for pure resizing.
| Need | Windows Photos | PowerToys Image Resizer | TinyPixels |
|---|---|---|---|
| Bulk resize dimensions | ❌ One at a time | ✅ Yes | ✅ Yes |
| Compression quality control | ❌ No | ❌ No | ✅ Yes |
| Format conversion (WebP/AVIF) | ❌ No | ❌ No | ✅ Yes |
| Folder watch automation | ❌ No | ❌ No | ✅ Yes |
If your only need is bulk resizing, PowerToys alone may be enough. The moment compression quality or format conversion enters the picture, none of Windows' built-in tooling covers that.
Common mistakes with default Windows image tools
Assuming resizing dimensions is the same as compressing
A smaller-dimension image can still be a large file if it's not also re-encoded efficiently — resizing and compression are separate problems, and Windows' built-in tools only address the first.
Manually resaving each photo through the Photos app editor
This works for a handful of images but doesn't scale — there's no batch mode, so every file is a separate open-edit-save cycle.
Not knowing PowerToys exists
Many Windows users aren't aware PowerToys' Image Resizer add-on exists at all — worth installing if bulk resizing (without compression control) is genuinely all you need.
Skipping WebP/AVIF because "Windows doesn't support it"
Windows itself can display WebP and AVIF fine in modern versions — the gap is specifically in built-in tools' ability to convert to those formats, not in playback support.
Migration notes: what changes, what doesn't
| What | Windows Photos | TinyPixels |
|---|---|---|
| Where you process images | Open each photo individually in the Photos app | Drag a file or folder into TinyPixels |
| Batch support | None — one photo at a time | Unlimited folder batches on Pro |
| Compression quality control | None — Photos doesn't expose a quality slider | Adjustable lossy/lossless modes |
| Format conversion | Limited, no WebP/AVIF export | PNG, JPEG, WebP, AVIF, GIF |
The Photos app remains fine for casual viewing and light photo edits — TinyPixels only replaces the compression and batch-export step it was never designed to handle.
Frequently asked questions
Can the Windows Photos app compress images in bulk?
The built-in Windows Photos app is designed for viewing and light editing, not dedicated batch compression. Resizing or re-saving multiple images typically means handling them one at a time.
Does Windows have a built-in tool to convert image formats in bulk?
Not natively for batch conversion to modern formats like WebP or AVIF. A dedicated tool is needed to convert and compress a whole folder of images to a different format in one action.
What is the best batch image compressor for Windows?
TinyPixels is a native Windows app built specifically for batch compression and format conversion — drop a folder of images and get compressed output, with no upload and no per-file manual steps.
Is there a Windows app that watches a folder and auto-compresses new images?
Yes. TinyPixels includes a watch folder feature on Windows — point it at a folder and every new image that lands there is compressed automatically in the background.
Can I resize photos in bulk using the Windows Photos app?
The Photos app supports basic resizing and rotation per image through its editing tools, but there's no bulk resize-and-export mode for a folder. Each photo needs to be opened and adjusted individually, which doesn't scale past a handful of files.
Does Windows have any built-in batch image tool at all?
File Explorer's right-click "Resize pictures" option (via PowerToys, if installed) can bulk-resize dimensions, but it doesn't offer compression quality control or format conversion to WebP/AVIF. It solves a narrower problem than a dedicated compressor.
Batch compress your photos on Windows
Free to start. No credit card, no account, no cloud. See Pro pricing →
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