Split a long post into numbered parts

The job

Forums, chat apps, and fediverse-style networks cap post length. A long announcement has to become 1/3, 2/3, 3/3 — and emoji in the text must not be torn in half at the seam.

Split it

Paste the text, set the character limit, and enable word-aware splitting plus part numbering. Each part is counted in grapheme clusters, so emoji and combined marks count as one and never split.

• Numbering reserves space: "1/3 " comes out of every part's budget, so parts stay under the limit even after the label.
• Word-aware mode falls back to a hard cut for a single word longer than the limit.

Worked example

A 2,300-character announcement at a 500-character limit produces five parts when word-aware is on — breaks land at spaces, and each part carries its 1/5-style marker within the limit.

Limits

Up to 1,000,000 characters of input and 500 parts. Pasting into the destination app is manual — copy each part or download them as a text file.