Free Twitter mass block extension for Chrome
Find the spam accounts on X, then block them all in one run.
The block icon on a post blocks its author immediately. For a manual batch, keyword and regex matches go to Candidates. Review the accounts and confirm the selection before the run starts.
At a glance
Features
X gives you one block at a time, buried behind a menu. This extension turns that into one icon per post — and one button for fifty accounts.
One click
Every post gets a slashed-person icon at the right end of its action bar, next to Share. One click blocks the author — no menu, no confirmation dialog, no scrolling back to find your place. Their posts and replies then disappear from the page you are on, so you can actually see that it worked.
Keywords & regex
Write the phrases the spam actually uses — airdrop, giveaway, "DM me" — or full JavaScript regular expressions for anything subtler. It matches them against the post text, display name, handle and bio, marks the hits with a red bar and collects the accounts in a candidate list.
Hidden characters
The most common way to beat a keyword filter on X is to pad every character of the message with invisible zero-width characters. The post looks completely normal on screen, but no filter can match it. The extension strips those characters before matching, and flags any post that is mostly invisible padding — a rule that keeps working when the wording changes.
Safety
Mass block on Twitter too fast and X starts refusing requests. This one blocks one account at a time with a 1.5 second gap plus random jitter, caps each run at 50, and backs off automatically when it is rate limited. Every action is logged with the rule that matched it, and one click unblocks.
About
A Twitter mass blocker is a tool that does in one pass what X makes you do one account at a time. X has a Block button, but it is buried in the ⋯ menu, it takes three clicks, and it does nothing to help you find the accounts worth blocking in the first place. X Blocker — a free, open-source Chrome extension for X (formerly Twitter) — fixes both halves of that: a single icon on every post for a one-click block, and a keyword scanner that gathers spam accounts into a list you can block in bulk.
As a Twitter bot blocker it matches your keywords and regular expressions against four fields — the post text, the display name, the handle and the bio — because the accounts flooding your replies usually give themselves away in their name long before they do in a sentence. Hits are marked with a red bar on the timeline and collected in a candidate list. Manual batches start after you review and confirm the selection. Fully automatic mode is off by default.
It also handles the trick that defeats ordinary filters. Spam replies on X routinely pad every character with invisible zero-width joiners, so a message that reads normally on screen is unmatchable as text. The extension strips those characters before matching and flags any post that is mostly invisible padding, which catches new wording as well as old. Read the guide on how to mass block accounts on Twitter, or the one on the invisible-character trick.
Because it acts on your own account, a Twitter blocker extension has to be careful. This one blocks accounts one at a time with a 1.5 second gap plus random jitter, caps each run at 50, and backs off automatically when X rate limits it. Every action goes into a log with the rule that triggered it, so a block you regret takes one click to reverse. There is no server, no analytics and no shared blocklist: your filters and your log never leave your browser.
Privacy
No account, no server, no analytics, and no shared blocklist. Your filters and your block log stay in your browser.
Filters, allowlist and log live in your browser's own storage. Nothing is uploaded to us, ever.
It uses your existing X session, the same way the x.com page does. No developer account, no paid API tier.
Only storage, plus access to x.com and twitter.com. No tabs, no browsing history, no remote code.
Block at a human pace, and only accounts you mean to block. See X's Terms of Service, the Chrome Web Store Program Policies and the MIT License.
How it works
Add the extension to Chrome or Edge, then open any user profile once. It learns X's internal query parameters from that single visit and remembers them.
Open the 🛡 panel at the bottom right of x.com, paste your keywords and regex into the Filters tab, then switch on keyword scanning in Settings. Scroll your timeline as usual.
In Candidates, uncheck any account you want to keep. Press Block selected, check the selection and confirm. The Log shows results and lets you unblock accounts.
FAQ
The block icon on a post blocks its author immediately. For a manual batch, keyword and regex matches go to Candidates. Review the accounts and confirm the selection before the run starts.
Yes. Free and open source under the MIT license, with no account, no subscription and no paid tier. It does not need an X API key either — it uses the session you are already signed in with.
Put your keywords in the Filters tab of the 🛡 panel, enable keyword scanning in Settings, and scroll your timeline. Matching accounts appear in Candidates with the rule that flagged them. Review the list, untick any false positives, and press Block selected to bulk block them one after another.
We cannot promise it will not. The extension calls the same internal block endpoint the x.com website uses, with your own session, and paces itself at 1.5 seconds per account by default. Blocking far faster than a human can trigger X's rate limits and, in extreme cases, an account check. Keep the default delay and the per-run cap of 50, and leave fully automatic mode off.
X's own Block is the action this extension performs — it just does it in one click instead of three, and for many accounts at once. What X does not offer is matching accounts by keyword or regex, matching against bios and display names, clearing the blocked account's posts off the page you are reading, and a log with one-click undo. Mute is different again: it hides posts but leaves the account able to follow, reply and message you.
Yes. The Log tab records every block with the account, the time and the keyword or rule that matched. Press Unblock on any entry to reverse it. You can also add handles to the allowlist so they are never flagged, no matter what they post.
No. There is no server, no analytics and no crash reporting, and you are never added to a shared blocklist network. Your keywords, allowlist and block log are stored locally by the browser and are deleted when you remove the extension. Every network request goes straight from your browser to X's own domains.
Yes. It is a standard Manifest V3 extension, so Chrome, Edge, Brave, Arc, Opera and other Chromium browsers all load it. Mobile browsers do not support extensions.
X blocks one account at a time: Block sits in the ⋯ menu, takes three clicks, and does nothing to help you find which accounts to block. This extension finds them by keyword or regex and blocks the ones you confirm, in bulk.
Guides
The full workflow for a bulk block on X: write your filters, scan the timeline, review the candidate list, and work through fifty accounts at a pace that will not trip X's rate limits. Includes what to do when you get a 429.
9 min readCopy-and-paste keyword lists and regex patterns for the crypto spam that fills replies on X: fake airdrops, giveaway bots, support impersonators and DM bait — plus how to keep them from catching real conversations.
10 min readInstall it, add three keywords, and clear the spam out of your replies today.
Add to Chrome
