PostTruncate

Preview your posts before the platform cuts them.

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June 27, 2026 I built a free social media character limit simulator as a solo dev — here's what I learned

Hey IH community,

I'm Anirudha, a solo developer from Assam, India. I hold an MCA, and I've been building PostTruncate (posttruncate.com) on the side.

The problem I kept hitting:

I'd write a LinkedIn post, hit publish, and watch it get cut off mid-sentence.

The "…see more" would appear right at the worst possible moment. Same thing on Instagram captions, TikTok, Threads — every platform has different fold lines and character rules.

I couldn't find a tool that showed me exactly where the cut happens visually, in real time. So I built one.

What PostTruncate does:

- Live post previews for LinkedIn, X, Instagram, Facebook, Threads, TikTok

- Shows exact fold lines (mobile + desktop) as you type

- X thread splitter — breaks long posts at sentence boundaries

- SMS segment calculator with GSM-7 vs Unicode detection

- Ad safe zone previews for Facebook, Instagram, TikTok, Google Ads

- Emoji counter, SERP preview, byte counter and more

- One-tap AI tone rewriting (professional, casual, friendly, concise)

- Available in 10 languages

- 100% free, no login, runs entirely in your browser

Current status:

~20 pageviews/day, focusing on SEO and backlinks right now. Pre-revenue, targeting AdSense once traffic grows.

What I'd love feedback on:

- What platforms or features are missing?

- Would you use this tool?

- Any SEO or growth tips for a solo dev with limited time?

Happy to answer anything. Thanks for reading 🙏

1 Comment

  1. 1

    I think you've solved a more expensive problem than character limits. The real cost isn't that a post gets truncated—it's that the hook loses its job. Once the "...see more" lands in the wrong place, the rest of the post often never gets read. If PostTruncate becomes the tool people trust to protect that first impression across platforms, that's a much bigger position than being a character counter.

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I was writing a LinkedIn post about my MCA project — spent 20 minutes getting the wording right — hit publish, and watched it collapse behind "…see more" at exactly the wrong sentence. I went looking for a tool that w