Apply clean two-color duotone effects to JPEG, PNG, and WebP images. Pick your own shadow/highlight colors or generate random palettes. Upload one or multiple images, fine-tune each, and export individually or as a ZIP — all fully client-side.
Batch-convert JPEG, PNG, and WebP images to grayscale with global or per-image control. Preview instantly, fine-tune individual photos, then download one or export everything as a ZIP — all processed locally on your device.
Add dark or tinted edges to your images with a fully customizable vignette effect. Adjust strength, pick any color, and fine-tune each image — all client-side and privacy-first.
Adjust the color temperature of JPEG, PNG, and WebP images directly in your browser. Make photos warmer or cooler with global and per-image controls, then export in the original format or as a ZIP — all fully client-side.
Enhance clarity and edge definition in JPEG, PNG, and WebP images using a high-quality sharpening algorithm. Adjust global strength, fine-tune each image, and export everything in the original format — all processed locally.
Apply sepia tones to JPEG, PNG, and WebP images with global and per-image controls. Create classic warm looks or strong aged effects, then export everything in the original format — all processed locally.
Add images
Drag & drop, paste, or click to upload JPEG/PNG/WebP files.
Previews load instantly and reflect EXIF orientation.
Set global posterization
Use the Levels slider (2–32) to control how flat or detailed the effect looks.
Fine-tune individual images
Click Edit on any card to adjust its Levels offset.
The modal shows a large preview and updates in real time.
Select what to export
Toggle Include in ZIP on each item, or remove images you don’t need.
Export
photo-posterize-8levels.jpgAll processing stays local and private. No uploads, no tracking.
Poster-style graphics
Turn photos into bold, print-style visuals for banners, thumbnails, or editorial design.
Comic-book & pop-art looks
Reduce color complexity for stylized, illustration-like results.
Social media content
Create eye-catching variations of existing images with just a slider.
Branding
Use mid-level posterization to create a cohesive visual theme.
Educational graphics
Simplify visuals for presentations or teaching materials.
Lower levels create drama.
Try 4–8 levels for the strongest poster-style look.
Avoid tiny images.
Posterization works best on medium to high-resolution photos.
Combine with other tools.
After posterizing, you can use:
Use per-image edits for consistency.
Some images respond stronger than others — the Edit modal helps normalize your set.
Pixel-level processing
The tool draws your image on a Canvas, reads raw pixel data via getImageData, and remaps colors into a smaller number of discrete steps.
Levels-based quantization
Posterization divides the 0–255 color range into N evenly spaced buckets.
Example for 8 levels:
Full-resolution export
The same algorithm is applied to your original image dimensions when exporting.
EXIF-aware loading
Images are decoded with orientation preserved using createImageBitmap({ imageOrientation: 'from-image' }).
Privacy by design
No servers involved. Everything runs in your browser, offline-ready.
JPEG, PNG, and WebP. Exports keep the original format and file extension.
It reduces the number of color levels in an image. Instead of smooth gradients, you get bold, graphic bands of color — similar to print posters or comic art.
Yes. Use the global Levels slider (2–32), then fine-tune each image individually in Edit mode.
No. Everything runs entirely in your browser. Your images never leave your device.
Yes. Once loaded (or installed as a PWA), the tool works offline because all processing is on-device.
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