Free tools
Free Social Media Tools: Hashtags, Captions, Counters and More
Updated · Multi Post Social guide
These free social media tools run in your browser, need no account and send nothing to a server. They are the same helpers that live inside the Multi Post Social composer, pulled out so anyone can use them: a hashtag generator, a caption generator, a character counter for every network, a best-time-to-post finder, a UTM builder and an image size guide. Use one on its own, or chain them to prepare a post from first word to final link.
- Hashtag generatorType a topic, get broad, medium and niche tags with the right count per network.Open the tool →
- Caption generatorThree captions per idea in the tone you pick, trimmed to the network limit.Open the tool →
- Character counterLive counts against every network limit, plus the first-line previews.Open the tool →
- Best time to postA weekly heat map of good posting windows by network, region and goal.Open the tool →
- UTM builderClean campaign links with presets for every network and naming rules.Open the tool →
- Image size guideEvery 2026 size, ratio and file limit for 12 networks in one filterable table.Open the tool →
The six free social media tools
Each tool solves one small, repeated problem. The hashtag generator saves the ten minutes you would spend hunting for tags. The caption generator gets you past the blank box with three different openings. The character counter stops a post from being cut off on X or Bluesky. The best-time finder gives a sensible starting schedule before you have your own data. The UTM builder keeps your analytics clean. The image size guide ends the search for the right pixel dimensions. None of them replaces judgment; all of them remove a chore.
| Tool | What it does | Best for |
|---|---|---|
| Hashtag generator | Builds broad, medium and niche hashtag groups from a topic, with the recommended count per network | Instagram, TikTok and Mastodon posts that rely on discovery |
| Caption generator | Writes three captions from a topic, a detail and a tone, trimmed to the network limit | Anyone stuck on the first line |
| Character counter | Counts characters, words, hashtags, mentions and links against 12 network limits | Cross-posting one text to several networks |
| Best time to post | Draws a weekly heat map of good windows by network, audience region and goal | New accounts without history yet |
| UTM builder | Adds source, medium, campaign, content and term tags to any link with clean naming | Teams that report clicks and conversions |
| Image size guide | Lists sizes, ratios, file limits and safe zones for every placement on 12 networks | Designers and anyone resizing a cover photo |
Why they are free
A tool that needs an account to count characters is a form, not a tool. We built these helpers for the composer first and then noticed how often people searched for them on their own. Publishing them costs little: they run entirely in the browser, store nothing and have no server behind them. In return, they show how the product thinks about posting, and some people who use them decide the full social media scheduler is worth a look. That is the whole business model of this page, stated plainly.
Because nothing is sent anywhere, you can paste a draft that is confidential, a client link that is not public yet, or a caption for a launch that has not been announced. Close the tab and it is gone. The privacy policy describes the few things the website itself records.
How the free tools connect to the product
Inside Multi Post Social, these helpers are not separate pages; they sit where you need them. The character counter is the live count under each network tab in the composer. The hashtag generator feeds saved hashtag groups. The caption generator is the lightweight cousin of the AI assistant, which knows your past posts and your tone. The best-time finder becomes a heat map built from your own results in analytics. The UTM builder runs automatically on every link when you turn link tagging on. The image size guide becomes format warnings when you upload media.
The difference is memory. A free tool starts from zero every time; the product remembers your channels, your groups and your history, so the same help arrives with less typing.
How to use the tools together
- Start with the caption generator to get a first draft in the tone you want.
- Paste the draft into the character counter and check the networks you will post to.
- Open the hashtag generator for the same topic and copy the medium group into a first comment or the end of the caption.
- Tag your link in the UTM builder so the clicks show up with the campaign name.
- Check the image size guide before you export the visual.
- Use the best-time finder to pick a window, then schedule the post.
The whole loop takes a few minutes. If you do it more than a few times a week, a free account in the product keeps the pieces together: see pricing for what the free plan includes.
Frequently Asked Questions
Do I need an account to use the free social media tools?
No. Every tool on this page works without signing up, and nothing you type is sent to a server. An account is only needed to save posts and schedule them.
Are the results the same as inside the product?
The logic is the same, but the product adds memory: your channels, your saved hashtag groups, your tone and your posting history. The best-time heat map in the product is built from your own results, which the free finder cannot do.
Can I use the generated captions and hashtags commercially?
Yes. Anything the tools produce is yours to edit and publish. Check hashtags on the network before using them, because meanings and popularity change.
Will more tools be added?
Yes. Requests arrive through the contact page and the roadmap lists what is planned. Tools that many people ask for are added first.
Keep the tools, add the memory
A free Multi Post Social account connects three channels and keeps your hashtag groups, drafts and best times in one place.
Keep Reading
- Caption GeneratorThree captions per idea, any tone.
- Hashtag GeneratorGrouped hashtags by topic and size.
- Templates40 templates grouped by goal.
- Glossary60 terms in plain words.
- AI AssistantCaptions, rewrites, hashtags and repurposing.
- Multi Post Social homeStart here: what Multi Post Social does and how to begin free.