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How can we help?

Everything you need to get ReplyCard working on X. If you're stuck, the answer is probably below — and if not, reach out directly.

Quick links

⚡ How it works Step-by-step guide to creating and posting your first card 💬 FAQ Common questions about injection, clipboard, and formats 🔧 Known issues Actively tracked bugs and their current status ✉️ Contact Report a bug or ask something not covered here

How it works

1

Install the extension

Install ReplyCard from the Chrome Web Store. After installing, navigate to x.com — a white "ReplyCard" button will appear in the bottom-right corner of every page.

2

Open a reply or new tweet

Click Reply on any tweet, or click the Post button in the sidebar to open the composer. The ReplyCard button will turn blue and change label to "Add Card" — this means a composer is detected and ready.

3

Click ReplyCard and write your text

Click the button to open the panel. Type your reply in the Write tab. Use the Style tab to change the theme, font size, line spacing, and decoration. Preview your card in the Preview tab before posting.

4

Click "Add to Post / Reply"

Hit the blue button. The image card is injected directly into the open composer — no copy-pasting needed. The status bar at the bottom of the panel confirms success with "Image added to post!"

5

Post on X as normal

Your card image is now attached. Hit Reply or Post on X to publish. That's it.

Frequently asked questions

Make sure the reply box is actually open and focused before clicking "Add to Post / Reply". Click inside the "Post your reply" text area on X first, then click the ReplyCard button. If the panel status bar says "Copied — paste Ctrl+V", just press Ctrl+V (or ⌘V on Mac) inside the reply box — the image is already on your clipboard.
X occasionally changes its internal DOM structure which can block direct file input injection. When this happens, ReplyCard automatically falls back to copying the image to your clipboard. Simply press Ctrl+V inside the reply box and the image will appear. This is the same result, just one extra keypress.
Yes. Write your first card, then click + Queue to save it. Write a second card (change style or text), queue it too. You can queue up to 3 cards. When you click "Add to Post / Reply", all queued cards are injected one by one. X supports up to 4 images per tweet. Queued cards are shown as blue dots next to the Queue button — click a dot to remove that card.
ReplyCard exports in WEBP format at 95% quality. Two sizes are available: Square 1080×1080 (best for timeline) and Wide 1200×675 (16:9, optimised for X's widescreen preview). Switch between them using the format buttons at the bottom of the panel.
No. ReplyCard injects a single lightweight button on X pages and does absolutely nothing until you click it. There is no background polling, no DOM observers, no timers running, and no network requests. The panel only loads when you open it. It has been specifically designed to have zero impact on X's performance.
No. ReplyCard collects zero data. The text you type is processed entirely in your browser to render the image — it never leaves your device. There are no servers, no analytics, no tracking of any kind. The extension does not read your tweets, your X account, or anything else on the page.
Try these steps in order: 1) Hard refresh the X page with Ctrl+Shift+R. 2) Go to chrome://extensions, find ReplyCard, and click the refresh icon. 3) Make sure the extension is enabled (toggle is on). 4) If you're on twitter.com rather than x.com, both should work — try navigating to x.com directly. If the issue persists, report it on GitHub.
Currently ReplyCard is only available as a Chrome extension (Manifest V3). Firefox and Safari support is not planned yet, but if there's enough interest it may be considered in a future version. You can open a feature request on GitHub.
Open the panel → go to the Style tab → scroll to the Footer section → toggle it off to remove "Generated with ReplyCard" from the exported image. The toggle is on by default.
Click the download icon (↓) next to the "Add to Post" button. The image will be saved to your Downloads folder as a WEBP file. You can then attach it to any platform manually.

Known issues

Known
Multi-image queue sometimes only injects one image X's composer can block sequential file injections. If only one card appears, use the clipboard fallback — the remaining cards are queued and can be pasted manually with Ctrl+V.
Known
Injection may stop working after X updates their frontend X regularly ships DOM changes. If direct injection breaks after an X update, the clipboard fallback will activate automatically. A fix will be pushed within a few days of any X update.
In progress
Firefox / Safari support Currently Chrome-only. Cross-browser support is being evaluated.
Fixed in v4
Panel cropping on smaller screens The panel was being cut off at the top or bottom on screens under 768px. Fixed with viewport-aware max-height in v4.0.
Fixed in v4
Page freeze on X Early versions used a MutationObserver that caused X to become unresponsive. Removed entirely in v4 — replaced with a single on-click check.

Get in touch

Bug reports & feature requests Open an issue on GitHub The fastest way to get a bug fixed or request a feature. Includes version history and issue tracking. github.com/AnshumaanVishnu/replycard →
General questions Reach out on LinkedIn For general questions, feedback, or anything not covered in the FAQ — connect directly. linkedin.com/in/anshumaanvishnu →
Developer Anshumaan Vishnu Built and maintained by Anshumaan Vishnu. Visit the personal website for more projects. ansh.asia →
Source code View on GitHub ReplyCard is open source. Browse the code, fork it, or contribute a fix. github.com/AnshumaanVishnu/replycard →