Category 01 · Image

Resize, crop, convert. Zero uploads.

Compress, resize, convert, crop, rotate, watermark, blur — everything you'd normally do in Photoshop or by trusting some upload site. All of it runs locally in WebAssembly, on your device. We have no way to see your files.

11
Image tools
7 fmts
In / out
0 KB
Uploaded
4.8/5
12,407 reviews
Supports →
JPEG PNG WebP AVIF HEIC GIF TIFF
→ All output
Most-used · 4.8M / month

Compress images up to 84% smaller without anyone noticing.

SSIM-targeted mozjpeg compiled to WebAssembly. The encoder picks the smallest file that stays above the perceptual threshold you set — then strips EXIF unless you say otherwise.

  • 5–20% smaller than libjpeg-turbo at identical SSIM
  • Up to 50 images per batch, zipped on download
  • Zero bytes ever leave your device
Compress now
ORIGINAL
colosseo.jpg
2.41 MB · 2752×1536
84%
COMPRESSED
colosseo.jpg
387 KB · SSIM 0.974
11 image tools · all local

The complete image toolkit.

All · 11 Optimize Transform Convert Adjust
01 / 11 ★ Top

Compress Image

Reduce JPG, PNG, WebP without losing quality. SSIM-targeted mozjpeg in WebAssembly.

Open
02 / 11

Resize Image

Change dimensions by pixels, percentage, KB or MB. Lanczos and Mitchell filters.

Open
03 / 11

Convert Format

JPG ↔ PNG ↔ WebP ↔ AVIF ↔ HEIC ↔ GIF. All seven formats, both directions.

Open
04 / 11

Crop Image

Pixel-precise cropping with preset aspect ratios for social, print, and the web.

Open
05 / 11

Rotate Image

90°, 180°, 270° in one click — or a free-angle slider with lossless rotation.

Open
06 / 11

Flip Image

Mirror horizontally or vertically. Useful for selfies and rookie-side scans.

Open
07 / 11 Trending

HEIC to JPG

iPhone photos to universal JPG. Decoded with libheif, no quality loss before re-encode.

Open
08 / 11

Add Watermark

Text or logo overlay, batch-apply across folders. Opacity, rotation, and tile patterns.

Open
09 / 11

Grayscale / B&W

Four tone profiles: Natural, Contrast, Sepia, Film. Real luminance math, not just drained colour.

Open
10 / 11

Brightness & Contrast

Brightness, contrast, exposure, highlights. Live histogram updates as you drag.

Open
11 / 11

Blur Image

Gaussian, motion or radial. Adjustable radius, live preview. Batch a whole folder at once.

Open
k·

1.2M people use this monthly · 4.8M images processed.

No tracking on your photos. There's no server-side endpoint for image data — not a limited one, not a hidden one.

1.2M
Monthly users
−84%
Avg. size cut
0
Files uploaded
Common questions

How does local image processing work?

Do my images ever leave my device?
No. Everything you see — compression, resize, conversion, watermark — runs in a Web Worker on your machine using WebAssembly builds of mozjpeg, libwebp, libheif and ImageMagick. We have no server endpoint for image data. You can verify this by opening the Network tab in DevTools while you use any tool.
What's the maximum file size I can process?
There is no kindatool-imposed limit. The practical ceiling is your browser's memory budget — roughly 2 GB on desktop Chrome / Firefox, less on Safari. We've seen single 600 MP PNGs go through fine on a laptop. For batches, we recommend ≤50 files at a time to keep the UI responsive.
Is the quality the same as Photoshop / Adobe?
For compression: yes — and often 5–20% smaller at identical SSIM thanks to mozjpeg's trellis quantization. For resize: we ship the same Lanczos & Mitchell filters Photoshop uses. For format conversion: identical encoders. The difference: we don't subscribe you to anything afterwards.
Will it strip EXIF / GPS metadata?
By default, yes. EXIF including GPS coordinates is stripped on every save. There's a "Keep metadata" toggle if you need it for archival reasons. Orientation flags are honored regardless — you'll never get a sideways photo back.
Why is there no account or sign-up?
Because there's nothing on our end to attach an account to. Your files never reach a server, so there's no "your photos" tab for us to show you. We don't run a credit system, we don't have batch quotas, we don't send emails. We're a static site with WebAssembly bundles.
100% local · 0 uploads · 0 accounts

Take back your bytes.

Eleven image tools. No email, no account, no upload. Try the one you need — the rest are one click away.

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WebAssembly No watermark No limit