Social Character Counter
Loved this tool? Stop copying and pasting to schedule.
Connect 14+ channels (including Bluesky, Threads, and Reddit) in one dashboard. Schedule your content once, let Postonus auto-repurpose it native to every network.
Why people use it
- Check post length dynamically against character limits for Twitter, Bluesky, Threads, and LinkedIn.
- Instantly highlight overflow text that exceeds the selected platform's limit.
- Get a breakdown of characters, words, sentences, and estimated reading time at a glance.
Suggested flow
Paste or type text
Type your draft or paste existing copy directly into the composer.
Check platform meters
Watch the real-time progress bars update to see if your text fits the limits of your target networks.
Visualise overflow & copy
Highlight exact characters that violate limits, refine your content, and copy the clean text with one click.
About this tool
A premium character counter built specifically for social media creators
This tool is built to let you draft cross-platform updates while keeping track of the different constraints of X/Twitter, Bluesky, Threads, and LinkedIn personal profiles.
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Questions
Frequently asked questions Everything the first evaluation usually needs.
- What if I'm already on Buffer / Pallyy / Publer?
Keep them. Run Postonus side-by-side for 30 days. Put your 3 best posts into a Growth Workflow. If it isn't earning its keep, cancel us — not them.
- Does the AI write my posts?
No. You write the post. Postonus's AI re-fits your draft into each platform's native shape — character limits, tone, hashtag norms. You review every variant before it publishes. Voice profile keeps it sounding like you.
- Which platforms do you support?
Fourteen: Instagram, TikTok, YouTube, LinkedIn, Facebook, X, Threads, Pinterest, Bluesky, Reddit, Telegram, Discord, Google Business Profile, and Tumblr. WhatsApp Groups support is in beta.
- How does the 14-day trial work?
Pick any plan. We don't ask for a card up front. At day 14, add a card or downgrade. We email you on day 12 to remind you.
- Can I import from another tool?
Yes. Bulk CSV import handles up to 50 posts per file (multiple files OK). Direct-from-Buffer import is on the Q4 roadmap.
- What happens if a post fails to publish?
Workers retry with exponential backoff. Failures show up in the Activity Feed with one-click retry. We email you only for unrecoverable failures (e.g. revoked token).