CHIKARA Image Optimizer
Turn multi-megabyte photos into a few hundred kilobytes — in bulk, on your device.
Preparing local engine…
Designed by Rodney Manyakaidze — Cognitive Futures Digital Libraries & Avilian Meals Research Labs

Shrink your photos.
Keep the memories.

Batch-compress, convert HEIC, and export web-ready sizes — entirely on this device. Nothing is uploaded, ever.

Install this appAdd it to your home screen for one-tap, offline access.
HEIC detected — Apple photo format found. It'll be decoded and converted automatically.
Drop photos or a folder here
or tap to browse — JPG, PNG, WebP, AVIF, HEIC/HEIF
JPEGPNGWebPAVIFHEIC/HEIF
Tip: dragging an entire folder works too — every image inside is picked up.
Output format
Best balance of size and browser support.
Quality vs. Fidelity
Quality80%
Resize
Max dimensionNo resize
Longest edge is capped; aspect ratio is always preserved.
Target file size
Auto-target a size
Binary-searches quality until it fits.
Multi-size export (responsive set)
Generate several sizes at once
One pass produces a full responsive set per image.
Each finished image will include this pill set: 1920px 1280px etc., bundled into the same ZIP.
Privacy & metadata
Strip EXIF / GPS / camera data
Removes location, device model, and timestamps.
Batch options
Keep original filenames
Recurring batch mode
Keep the queue open to drop more folders in as you go.
Your savings 0%
Before
0 KB
→
After
0 KB
Comparing…
Original Optimized
Original
Optimized
— % smaller
No photos yet. Add some above to get started.
Quick-access bookmarklet
Drag this to your bookmarks bar. Click it on any page to jump straight back here with your last-used settings.
Optimize with CHIKARA Drag, don't click — this link only works from your bookmarks bar.
100% local. No uploads, no accounts, no tracking.
CHIKARA