Free tools · Updated August 2026 · Works in your browser

Free Threads Tools

Everything on this page runs in your browser or on our AI, without an account. Threads has no text formatting. Threads posts and replies are 500 characters. The tools below handle the formatting, counting, previewing and writing; the scheduler handles the posting.

Write & format

Threads Text FormatterBold, italic, underline and bullets for Threads posts.Threads Font Generator25+ copy-and-paste font styles for Threads.Threads Bold Text GeneratorBold text for Threads posts, bios and comments.

Preview & mockups

Threads Post PreviewSee the feed version of a Threads post before you post.Threads Post Mockup GeneratorRealistic Threads post cards for decks and client approvals.

AI generators

Threads Caption GeneratorFive Threads captions from a one-line brief.Threads Bio GeneratorFive Threads bios under 150 characters.Threads Hashtag GeneratorThree hashtag sets sized for Threads.Threads Comment GeneratorFive Threads comments that add something.Threads Post GeneratorThree complete Threads posts from a brief.

Counters & checks

Threads Character CounterLive count against every Threads limit.Threads Username CheckerRules check, availability link, alternatives.

Calculators

Threads Engagement Rate CalculatorEngagement rate by followers, reach or views, with benchmarks.

Threads limits and sizes at a glance

Threads posts and replies are 500 characters. The bio is shared with Instagram at 150 characters, and one topic tag per post replaces hashtags.

Posting on Threads in 2026

Threads posts are short by design (500 characters) and the feed rewards replies more than likes. Opinions, questions and one-liners do better than announcements.

Threads replaced hashtags with a single topic tag per post, without the # sign. Pick the one tag people actually browse.

Threads character limits (2026)

Field	Limit	Note
Post	500
Bio	150	Shared with your Instagram profile
Username	30	Same as your Instagram username
Reply	500
Topic tag	1	One tag per post, no # needed

Formatting support on Threads

Threads has no text formatting. Unicode characters work, and Threads keeps line breaks.

Threads shows the first few lines and folds the rest.

Threads image sizes (2026)

Placement	Size (px)	Ratio
Portrait post	1080 × 1350	4:5
Square post	1080 × 1080	1:1
Landscape post	1080 × 566	1.91:1
Profile photo	320 × 320	1:1

Need one of these sizes? Use the Threads image resizer.

Hashtags on Threads

Threads replaced hashtags with a single topic tag per post. Limit: 1. Sweet spot: 1 topic.

Frequently asked questions

Are these Threads tools free?

Yes. The browser tools have no limits; the AI tools allow ten generations a day without an account.

Can I schedule Threads posts here?

Every tool has a "Schedule" link that opens Social by InstantDM with your text prefilled: it publishes to Threads and seven other platforms from one calendar.

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Write it here, publish it everywhere

Social by InstantDM schedules to Instagram, Facebook, X, LinkedIn, TikTok, Pinterest, Threads and YouTube from one calendar, with AI captions, previews and an API. Start free — $0 today, cancel anytime.