Are the tools really free?

Yes. There is no account, no trial and no limit on the tools that run in your browser. The AI tools (the hook analyzer, hashtag generator and post idea generator) have a fair-use rate limit and a quick bot check, because each run costs us a model call.

Which tool should I start with for TikTok?

The hook analyzer. Paste a TikTok that did well in your niche and it shows the hook from the first 3 seconds, the format, the call to action and why it worked. Then use the post idea generator for a week of TikTok ideas, and the best-time guide to pick when to post.

Do you keep what I type?

The browser tools never send it anywhere. The hashtag and post idea generators send your short description to our tools server, which asks a model and returns the answer without saving it. The hook analyzer keeps the breakdown of the public video you pasted for 30 days, not anything about you.

Can I run these from code or an AI agent?

The postpeg API does the same jobs at scale: it watches your TikTok niche daily, breaks down every breakout video, writes your version, posts it and benchmarks it. Agents use it over MCP. The free tools are the one-off, by-hand version.

Free tools · no sign-up

Free tools for your next post

See why a TikTok worked, find hashtags, plan a week of posts, check a caption fits every network, and get the size and timing right. Free, in your browser, with no account.

Which tool for which job

TikTok hook analyzer: Paste a TikTok link and see the hook from its first 3 seconds, the format, the call to action and why it worked, read from the transcript. Free, no sign-up.
Hashtag generator: Describe your post and get hashtags picked for the network you post on, with how many to use and why each tag fits. Free, no sign-up.
Post idea generator: Name your niche and network and get a week of post ideas: a format, an opening line and an outline for each day. Free, no sign-up.
Character counter: Paste a post and see how it fits the text limit on X, Instagram, Facebook, LinkedIn, TikTok, YouTube, Threads, Pinterest, Bluesky and Google Business.
Best time to post: The best times to post on each network according to published studies, with sources, in your time zone. A starting point to test against your own analytics.
Image size guide: Recommended image and video sizes for posts, stories, profile photos and covers on every major network, with sources, plus a checker for your own image’s shape.
Text formatter: Turn plain text into Unicode bold, italic or monospace you can paste into LinkedIn posts, X posts and Instagram bios, with an honest note on accessibility.

About these tools

The character counter, text formatter, image size guide and best-time guide run entirely in your browser: nothing you type leaves the page. The hashtag and post idea generators send your short description to our tools server, which asks an AI model and sends the answer back, without saving what you typed. The hook analyzer reads a public TikTok through the postpeg API, which keeps a video’s breakdown for 30 days so the next person to ask gets it instantly.

Every guide cites its sources. The best times come from published studies and the image sizes from the networks’ own help pages, each linked, with third-party figures marked. Where we couldn’t find a reliable number, we leave it out.

Questions

Are the tools really free?: Yes. There is no account, no trial and no limit on the tools that run in your browser. The AI tools (the hook analyzer, hashtag generator and post idea generator) have a fair-use rate limit and a quick bot check, because each run costs us a model call.
Which tool should I start with for TikTok?: The hook analyzer. Paste a TikTok that did well in your niche and it shows the hook from the first 3 seconds, the format, the call to action and why it worked. Then use the post idea generator for a week of TikTok ideas, and the best-time guide to pick when to post.
Do you keep what I type?: The browser tools never send it anywhere. The hashtag and post idea generators send your short description to our tools server, which asks a model and returns the answer without saving it. The hook analyzer keeps the breakdown of the public video you pasted for 30 days, not anything about you.
Can I run these from code or an AI agent?: The postpeg API does the same jobs at scale: it watches your TikTok niche daily, breaks down every breakout video, writes your version, posts it and benchmarks it. Agents use it over MCP. The free tools are the one-off, by-hand version.

For developers

Publish to all of them with one API call

postpeg is an API for products that post to social networks. Write the post once, and it is checked against every network’s rules, then published or scheduled on any mix of the 10 networks we support, with a status for each account.

See the posting API Read the quickstart