Does it log into my account or store my password?

Never. You log into Facebook normally in Chrome. GroupBlaster doesn't touch cookies, tokens, passwords, or private messages. It only stores group metadata, your campaign content, and a cosmetic account identity (display name plus profile picture) locally in your browser — and that identity is read from page DOM only.

What happens if Facebook shows a CAPTCHA or warning mid-campaign?

The campaign stops immediately and asks you to intervene. Live progress, a countdown to the next group, and toast notifications keep you oriented, so nothing ever looks frozen — and nothing posts while a challenge is on screen.

How do the three publish modes differ?

Manual post fills the caption plus photos as one post and lets you click Post in Facebook yourself. Confirm each group has you approve or skip every filled post without touching Facebook's buttons. Auto publish clicks Post automatically after a short safety delay. All three enforce the same pacing floors.

I manage two Facebook accounts. Does that work?

Yes. Groups, campaigns, schedules, and progress are stored per logged-in account, so switching accounts swaps the visible dataset. Your avatar shows in the header so you always know which account you're posting as.

Something went wrong — how do I report it?

Open Settings → Advanced, turn on Debug logging, reproduce the problem, then open View logs and copy the timestamped trace into your bug report. Quote the app version shown in Advanced too — it's the single source of truth for which build you ran.

GroupBlaster shark mascot: Collect 100+ groups in seconds

GroupBlaster shark mascot: Automate your daily posting schedule

GroupBlaster shark mascot: Post safely without account risk

GroupBlaster shark mascot: Reach every group without tab-hopping

Free Chrome extension for Facebook Groups

Post to Every Facebook Group in Minutes — No More Tab-Hopping

Name: GroupBlaster
Author: GroupBlaster

Write your post once, pick your groups, set a schedule — and GroupBlaster handles the rest. Start free with 5 campaigns and 10 posts/month. Upgrade for unlimited automation.

Add to Chrome — Free to Start See how it works

Your data stays in your browser

GroupBlaster

Facebook Group Poster & Publisher

LIVE

Next post in 42s— then Harbor Sellers

Campaigns

Every saved campaign lives here — each with its own post, groups, and schedule.

Create campaign

A campaign is posting nowOpen

Morning Drop

5 group(s) · 2 attachment(s)

Daily 8:00 AM

Open Edit

Morning Drop

5 groups · running

Done

Failed

Skipped

Review

Downtown Riders

Success View post

Weekend Market

Success View post

Gadget Traders

Skipped

The actual GroupBlaster popup — shown here with sample data.

Free tier available
Google account login
Data stays in your browser
Works on Chrome, Edge, Brave, and more

Why GroupBlaster

Posting to 20 Groups Shouldn't Take Your Whole Evening

If you sell, announce, or organize across Facebook Groups, you know the drill. GroupBlaster replaces the tab-hopping grind with one calm workflow.

Posting the old way

Copy-paste the same caption into tab after tab
Photos split from captions across duplicate composers
Posting schedules live in your head — or nowhere
One distracted evening and a group never gets the post
No idea which groups already got it and which didn't

The GroupBlaster way

One campaign owns its post, its groups, and its schedule
Caption plus photos filled as one post, every time
Once, Daily, Weekly, or Monthly cadences per campaign
Sequential publishing with live progress and countdowns
Posting history with links back to every published post

How it works

From Manual Chaos to Automated Calm

Three steps take you from tab-hopping chaos to fully automated posting — with you still in control of every post.

1
Collect your groups
Hit Scan All: it opens your Facebook groups page, scrolls it to the bottom until every group is collected, and merges them locally.
2
Build a campaign
Give it a name, write the post once, and pick exactly the groups it goes to. Each campaign owns its content — opening one restores its own group set.
3
Schedule and publish
Set a Once, Daily, Weekly, or Monthly cadence — or publish right now. Groups are processed sequentially with conservative delays and live progress.

Morning at 8:00 and evening at 18:00? Give each its own campaign — simultaneous cadences are fully supported.

Publish modes

You Decide How Much Control to Keep

Every campaign runs group by group with pacing floors of at least 15 seconds between posts. Pick the approval style that fits the moment.

Manual post

Photo plus caption are filled as one post — you click Post in Facebook yourself, then confirm before it moves to the next group.

Best for: maximum control over every single post.

Confirm each group

Review each filled post and approve or skip group by group. Approving posts automatically — don't click Post yourself.

Best for: fast review without touching Facebook's buttons.

Auto publish

Posts are clicked automatically after a short safety delay, with conservative pacing between groups and live progress throughout.

Best for: scheduled campaigns you trust completely.

Safety and privacy

Built to Protect Your Account, Not Risk It

Automation that fights Facebook gets accounts banned. GroupBlaster is designed the other way: human-in-the-loop controls, honest pacing, and zero credential handling.

Stops when Facebook pushes backWarnings, CAPTCHAs, login challenges, or restrictions halt the campaign immediately and ask you to intervene. Nothing posts behind your back.

Conservative pacing, enforced in codeAt least 15 seconds between posts, sequential group-by-group runs, and collided schedules retry in 15 minutes instead of stacking.

No passwords, cookies, or tokensYou log into Facebook normally in Chrome. GroupBlaster never touches session data — only group metadata and your post content, stored locally.

Account identity is cosmetic onlyThe logged-in account is detected from page DOM — numeric ID, display name, and profile picture. Multi-account data stays in separate buckets.

Narrow permissions, side-panel readyOnly storage, scripting, alarms, side panel, clipboard, and Facebook host access. It can live in Chrome's side panel while you browse.

Who it's for

Save Hours Every Week on Facebook Group Posting

Whether you're selling in marketplaces, managing communities, or promoting events — stop the copy-paste marathon and let GroupBlaster handle the busywork.

Marketplace sellers

Post to Every Buy-and-Sell Group in Minutes

Morning drop and evening drop done in one click. Create two campaigns, set your schedule, and reach every group twice daily — without opening 20 tabs.

Cut 2 hours of posting work into 15 minutes

Community managers

One Announcement Across All Your Chapters

Write your event post once, attach the poster, and publish chapter by chapter. GroupBlaster keeps your place while you approve each post.

Eliminate 30+ minutes of repetitive copy-paste

Creators and event hosts

Tour Dates and Launches Without the Grind

Schedule weekly promo campaigns per city or fan group. Posts go out automatically with full history tracking — no manual copy-paste required.

Reclaim 3+ hours per week for actual work

Works on Your Browser

Built for Chrome. Works Everywhere.

GroupBlaster is built on Chrome's extension standard — which means it works on any Chromium-based browser. Install once, use it wherever you browse Facebook.

Chrome

Edge

Brave

Opera

Vivaldi

Arc

No Chrome required. If your browser supports Chrome extensions, it supports GroupBlaster.

Pricing

Save 3.5 Hours Every Week. Start Free.

Stop tab-hopping through 20 Facebook groups. Write once, pick your groups, set a schedule — and GroupBlaster handles the rest.

Free

$0forever

Perfect for getting started and testing the workflow.

Get started free

5 campaigns to test different use cases
10 posts per month
Manual publish mode only
Unlimited group discovery
Multi-account buckets with avatar switching
Side-panel mode for posting while you browse
Posting history with links back to every post
Secure Google account login

Auto publish mode

Confirm publish mode

Scheduling & cadences

Honest Answers Before You Install

The questions every careful group admin asks — answered straight, including the ones about account safety.

No tool can promise that — anyone who does is lying. What GroupBlaster does is stay conservative by design: sequential posting with at least 15 seconds between posts, human-in-the-loop approval modes, and an instant halt if Facebook shows a warning, CAPTCHA, or login challenge. You approve the publishing; the extension never fights Facebook's safeguards.

Stop Tab-Hopping. Start Automating.

Start free with 5 campaigns and 10 posts per month. Upgrade when you're ready for unlimited automation.

1.Add to Chrome

One-click install from the Chrome Web Store. No technical setup required.

2.Collect your groups

Scan all your Facebook groups in seconds. Your data stays local and private.

3.Start posting

Write once, pick groups, and let GroupBlaster handle the rest. You're always in control.

Add to Chrome — Free to Start

No credit card required for free tier. Cancel anytime.