How to Delete All Your Slack Messages in Channels

Why Use Redact.dev to Delete Slack Messages?

Slack is one of the most widely used platforms for workplace communication—but that doesn’t mean every message you’ve sent should stick around forever. Whether you’re looking to erase private messagess, remove old conversations from public channels, or delete sensitive files, Redact.dev gives you the control to wipe your Slack history on your terms.

There’s heaps of reasons to consider deleting your old chat messages in Slack – if you care about your privacy, and your right to express yourself freely without being surveyed, deleting your Slack messages regularly helps safeguard you against prying eyes.

Please note – mass deleting your Slack DMs requires a Redact Ultimate subscription. You can try Redact for free on Twitter/X, Discord, Reddit and Facebook!

If you want to learn more about the Redact.dev deletion tools, check out our Premium options here

With Redact.dev, you can:

• Mass delete Slack messages across channels and DMs
• Filter deletions by keyword, date, or message type
• Clean up old conversations before quitting or switching jobs
• Remove potentially risky content you forgot about

Best of all, Redact.dev is free to download, and gives you access to powerful deletion tools with just a few clicks.

Delete Messages Across Multiple Channels

Skip the manual message hunt. Select one or more Slack channels and wipe messages in bulk. Redact.dev does the heavy lifting for you – saving hours of scrolling and searching.

Bulk Delete Direct Messages

Had sensitive convos with coworkers? You can bulk-delete private Slack Messages using Redact.dev. Target everything from keyword-specific messages to entire conversation histories. You can even preview or selectively delete messages first.

Delete by Keyword or Date Range

Use Redact’s advanced filters to target messages that mention specific keywords (like “HR”, names, or anything NSFW), or narrow by date. Clean up just the last week, or go back to 2018.

Remove Files

Use the Message Type Filter to delete specific kinds of Slack content. That includes files!

How to Delete Slack Messages with Redact.dev

Download & Install Redact.dev

Visit redact.dev/download and install the desktop app (Windows or macOS).

Log In & Connect Your Slack

Select Slack from the services list and follow the prompts to securely connect your workspace.

Set Filters or Choose Deletion Mode

• Pick channels or DMs
• Set date ranges
• Enter keywords
• Choose message types
• Or skip filters to delete everything

Preview, Pick & Delete

• Preview Mode: See what will be deleted first
• Select & Delete: Pick specific messages to delete
• Start Deleting: One click to wipe it all

Done!

Redact.dev will work through your Slack history and clean it up exactly the way you told it to. Just keep the app open until it finishes.