Slack screenshots without the messy real conversations
You’re building a slide deck for an internal workflow proposal. Or writing a blog post about team communication. Either way, you need a Slack screenshot, but the real ones have sensitive project names, half-typed messages in the composer, and twelve unread DM badges. Not exactly presentation-ready.
This tool gives you a blank Slack channel that you fill with exactly the messages you need. Channel name, topic line, member count, pin indicator, all customizable. Add messages with usernames, timestamps, reactions, and even threaded reply counts.
Setting it up
Start with the channel details: name (like #product-launch), topic text, member count, and pinned items count. These populate the channel header bar.
Then add messages. Each message takes a username, text content, and timestamp. You can attach reactions, pick from Slack’s standard emoji set and set the count for each. Thread indicators show “X replies” below a message with a small avatar stack, just like real Slack.
Toggle between Slack’s light and dark themes. The dark theme nails the charcoal sidebar and darker message pane. Light mode uses Slack’s classic white background with purple accents.
Why people make these
Product managers demoing new Slack workflows. Instead of hoping the right messages appear in your channel during a live demo, prepare a mockup that shows exactly the interaction pattern you’re proposing.
Trainers and onboarding specialists creating guides for new employees. Show them what proper Slack etiquette looks like with perfect example conversations. Threads used correctly, reactions for acknowledgment, pinned messages for reference.
SaaS companies showing Slack integration screenshots on their marketing pages. Your bot’s messages need to look professional in the docs, and a controlled mockup beats hoping users screenshot the right moment.
Content writers covering remote work tools. Articles comparing Slack, Teams, and Discord benefit from consistent, clean screenshots where the content matches your narrative.
Accuracy details
Username colors pull from Slack’s actual hash-based color assignment, the same name always gets the same color. The reaction pills match Slack’s exact border radius and emoji sizing. Thread indicators show the correct “X replies” format with avatar thumbnails.
The date separator line (“Tuesday, January 14th”) sits between message groups. The channel header shows the hash icon, channel name in bold, member count, and pin count, all positioned exactly where Slack puts them.
Avatars default to colored squares with the user’s initial, matching Slack’s default avatar style. Upload custom profile pictures for any user if you need specific branding.
FAQ
Can I show threaded conversations? Yes. Set the thread reply count on any message and it’ll display the “X replies” indicator below it with an avatar stack, just like Slack shows threads inline.
Do reactions look authentic? Each reaction pill shows the emoji and count with Slack’s exact styling, light gray background, rounded corners, and blue highlight for “your” reaction.
How do I add file attachments? The current version supports text messages with reactions and threads. For file attachment mockups, you can describe the file in the message text or combine the output with an image editor.
Can I customize the sidebar? The mockup focuses on the channel message pane, which is the part people actually screenshot. The sidebar isn’t included since it typically contains workspace-specific navigation that varies between organizations.
What resolution does it export at? The PNG exports at 2x resolution for crisp display on retina screens and high-DPI monitors. Perfect for presentations, blog posts, and print materials.