How this free Twitter (X) scheduler works
Draft a tweet with a 280-character grapheme-aware counter, set reply controls, attach media, and pick a publish time. Sign up for Postmixr free to push the tweet to X on schedule via the official API.
X character limit (280) and counter accuracy
Each tweet on X allows up to 280 characters. The counter on this page goes red the moment you exceed 280 so you know to trim before scheduling.
- Attach up to four images or one video per tweet after signing in.
- Reply control matches the conversation_controls field on the X v2 API.
- Need a thread? Toggle thread mode — the URL updates to the dedicated thread scheduler.
Why schedule from Postmixr instead of the X website
Postmixr uses the paid X API so scheduled tweets actually publish on time, plus you keep drafts, threads, and multi-platform posts in one calendar alongside Instagram, TikTok, and LinkedIn.