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David Christian Liedleleft a comment
I first saw this problem in 2017 watching teams lose years of institutional knowledge during Slack migrations. The export existed but the tooling to actually use it never did. Built this in a single day using Claude Code. It's a single HTML file — no backend, no framework, no tracking. Your data never leaves your browser. Would love feedback from anyone who tries it with a real export!
SlArchive — Browse Your Slack HistoryDon't get trapped in Slack's weird export format
Drop your Slack export ZIP into slarchive.com and instantly browse your entire workspace history — channels, DMs, threads, reactions, and search — all processed locally in your browser.
Nothing is uploaded. No account required. Your data never leaves your device.
Export any channel to HTML, Markdown, or JSON when you're ready to migrate.
Free and open source (MIT). Built by David Liedle.
SlArchive — Browse Your Slack HistoryDon't get trapped in Slack's weird export format
