Bulk Image File Size Reducer (WebP/AVIF) — Free
Upload a batch, pick an output format, set a per-image target like 200KB, and download everything as a ZIP. Best-effort optimization: some images may not reach the exact target without heavy quality loss.
Optimization settings
Use safe defaults, then tighten the target.
WebP is widely supported. AVIF is smaller but can be slower.
Example: 200 = try to make each output file ≤ 200KB.
Quality bounds
Keeps results usable while trying to hit your target.
Higher = closer to target, but slower.
Optional resize
0 = no resize. Images only shrink, never upscale.
Notes
- • If you need sharper text/logos, raise Min quality.
- • If outputs are still too big, try AVIF or set Max width/height.
- • Very noisy images (photos) may not compress as low as graphics.
How it works
- Upload one or more images (drag & drop or click to browse).
- Choose WebP or AVIF, then set a per-image size target (e.g., 200KB).
- Optionally cap max width/height, and strip metadata for extra savings.
- Click “Download ZIP” to process the entire batch.
This tool uses best-effort compression. Some images may not hit the target without visible quality loss.
FAQ
Quick answers about targets, formats, and ZIP downloads.
Is the Bulk Image File Size Reducer free? ⌄
Yes. It’s free to use and downloads your results as a single ZIP.
No sign-up required.
Why didn’t some images reach my target size? ⌄
Some images (noisy photos, gradients, screenshots with fine details) can’t shrink further without unacceptable blur.
Try AVIF, reduce dimensions, or lower Min quality if acceptable.
Should I choose WebP or AVIF? ⌄
WebP is widely compatible and fast. AVIF often gets smaller files but can be slower to encode/decode.