Webtoon stitcher and splitter

Joins webtoon slices of different heights in order and splits them again at the height you choose. Each cut is moved to a blank (flat-colour) row, so speech bubbles, text and line art are never sliced in half. Everything happens in your browser; your files are not uploaded anywhere.

Files never leave your device

Drop images here or choose files JPG, PNG, WebP · sorted by file name (2 comes before 10)

No images selected yet.

Click a slice to download it on its own.

Settings Output width Target slice height (px) A cut may move slightly above or below this height to avoid splitting a bubble. Cut sensitivity: 90 High = only cuts on perfectly flat rows. Lower it for gradient backgrounds. Ignored edge (px) If the page has a border or frame line, leave this many pixels out of the cut decision.

Output format Quality: 90

File name prefix

How it works

Images are sorted by file name, scaled to the width you choose and stacked into one strip.
For every cut, the rows around the target height are checked: the cut goes on the first row with no difference between neighbouring pixels — a blank background.
If no such row exists, it cuts at the target height and tells you how many forced cuts there were, so you can check those slices.
Slices are named 01, 02 … in order and can be downloaded one by one or as a ZIP.

In-depth guide: stitching and splitting webtoons →

Frequently asked questions

Are my files uploaded to a server?

No. Stitching and splitting happen entirely in your browser, on your own device. The tool keeps working even if you go offline after the page has loaded.

Will it cut through speech bubbles?

Smart splitting moves each cut to a blank, flat-colour row. If there is no flat row near the target (for example a scene that fills the whole strip), it cuts at the target height and reports it as a "forced cut". Lowering the sensitivity helps on gradient backgrounds.

What is the maximum slice height?

Browsers limit canvas size, so the maximum depends on width (about 20,000 px at 800 px wide). WebP cannot store images taller than 16,383 px. Values above the limit are lowered automatically.

Which format should I choose?

For a colour webtoon release, JPG at 85–92% quality is usually enough. Choose PNG for lossless working files you will keep editing. WebP gives smaller files at the same quality, but some older tools cannot open it.

Does it work on a phone?

Yes, but very long chapters can hit the phone browser's memory limit. A computer is more comfortable for chapters with 40–50 slices.

In what order are images joined?

By file name, reading numbers as numbers: 2.jpg comes before 10.jpg. If your names are inconsistent, rename them first.