Local · Private · Free

X / Tweet Preview

Count characters the way X really does (URLs = 23, emoji = 2), split long posts into a numbered thread, and see a live preview, all on your device.

Compose

280 left

add (1/n) numbering

Runs entirely on your device, nothing is posted or sent anywhere.

Thread

Each tweet is editable, counters update as you type. Re-split to regenerate from the composer.

Live preview

Digital Heroes

@digitalheroes · 2h

Your post appears here as you type…

Preview details

Display name

Handle

Time label

Replies

Reposts

Likes

About X / Tweet Preview

X / Tweet Preview is a free, private browser tool by Digital Heroes for composing and checking posts before you publish. It counts characters using X's actual weighted rules: URLs always cost 23 characters, most emoji and CJK characters cost 2. Long posts are split into a numbered thread automatically. A live card lets you preview exactly how the post looks, in light or dark mode, with a custom name, handle, and engagement numbers. Everything runs locally in your browser. Nothing is uploaded. No sign-up is needed, and the tool works offline once loaded.

What you can do

Count characters accurately using X's weighted rules (URLs = 23, emoji = 2) before you post.

Split any long draft into a thread with automatic (1/n) numbering and an editable card per tweet.

Preview the post live as a realistic X card in light or dark mode as you type.

Customise the preview with your own display name, handle, time label, and engagement counts.

Copy or download your thread as plain text with one click, ready to paste into X.

Edit each tweet independently after splitting, with per-card character counters that update in real time.

How to use X / Tweet Preview

Open X / Tweet Preview in your browser. No signup, no install required.

Type or paste your draft into the Compose box. The character counter updates instantly using X's weighted rules.

Click Split into thread to break a long post into numbered tweets. Each card is editable.

Use the Live preview panel on the right to see how your post looks. Switch between light and dark mode and set your own handle and engagement numbers.

Click Copy whole thread or Download .txt to save your result.

Frequently asked questions

Is X / Tweet Preview free?

Yes, X / Tweet Preview is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. X / Tweet Preview runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. This tool is a Progressive Web App, once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does X / Tweet Preview do?

It gives you a weighted character counter (URLs = 23, emoji = 2), an automatic thread splitter, and a live post preview with light and dark mode. All of it runs in your browser with no upload.