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Free AI · No signup · Drafts saved locally

The X editor built for posts & threads.

Write, format, and ship X content with Unicode bold & italic that works on free accounts, drag-to-reorder threads, live preview, and a free AI assistant.

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Drafts stay in your browser. AI runs on free OpenRouter models.

Threadly thread spool logo

One spool. Endless threads. Threadly turns ideas into beautifully formatted X posts in seconds.

0
accounts required
100%
client-side
∞
drafts saved locally
Free
AI assistant

Everything you need to write great X content

A focused writing tool first. AI is there when you want it — never in the way.

Unicode formatting that survives X

Bold, italic, underline and strikethrough render as Unicode glyphs so your formatting shows even on free X accounts.

Drag-to-reorder threads

Build long-form threads with live character counts, auto numbering, smart splitting, and tweet-length balancing.

Free AI assistant

Paste a blog post or rough draft and Threadly turns it into a polished thread using free OpenRouter models, with automatic fallback when one is rate-limited.

Private by design

No accounts, no analytics, no servers. Drafts and settings stay in your browser's local storage.

Fast and lightweight

The editor loads instantly and stays responsive, even on long threads with dozens of tweets.

Templates & live preview

Start from proven hook templates and see exactly how your post will look in the X feed as you type.

How Threadly works

From idea to published thread in four steps.

  1. 01
    Open the editor

    No signup. The editor loads instantly in your browser.

  2. 02
    Write or paste

    Start fresh, use a template, or paste long-form content.

  3. 03
    Format & enhance

    Apply Unicode formatting or ask the AI to polish it.

  4. 04
    Copy & post

    Copy any tweet or the whole thread and ship it to X.

Unicode for Free X

Formatting that actually works on X

X only ships native bold/italic to Premium users. Threadly converts your formatting into mathematical Unicode glyphs that render for everyone, on every device.

  • Bold, italic, underline, strikethrough
  • Bullet & numbered lists
  • Switch between Free X (Unicode) and Premium X (native)
  • Live character counter with safe-zone warnings
// In Threadly
Bold · italic · strike
// What ships to X (Free)
𝐁𝐨𝐥𝐝 · 𝑖𝑡𝑎𝑙𝑖𝑐 · s̶t̶r̶i̶k̶e̶
✦ Renders for everyone. No Premium required.

Free. Forever. Really.

The editor runs in your browser, and the AI uses free OpenRouter models. No plan to upgrade, no account to create.

Threadly
$0/ forever
  • Single posts & threads
  • Unicode formatting engine
  • Drafts & templates in local storage
  • Free AI assistant (OpenRouter)
  • No signup, no tracking
Start writing now

Frequently asked questions

Is Threadly really free?
Yes. The editor runs in your browser and the AI uses free OpenRouter models. No plan to upgrade, no account to create.
Where does the AI run?
Your text is sent to OpenRouter's free models through Threadly's server, which keeps the API key private. Drafts themselves stay in your browser.
Will the Unicode formatting work for non-Premium X users?
Yes — that's the whole point of Free X mode. Threadly converts text into Unicode glyphs that render for every reader.
Where are my drafts stored?
In your browser's local storage. Clearing site data will remove them, so export anything important.
Do I need a fast computer to use the AI?
No. The AI runs on OpenRouter's servers, so any modern device works. If one free model is rate-limited, Threadly automatically tries the next one.

Spin up your next thread.

Open the editor and ship a post in under a minute. No signup, ever.

Launch Threadly