Paste messages from Slack or Beeper, get clean markdown

This little webapp is intended to make it easier to copy messages from Slack or Beeper into other places for sharing or archival, with cleaned-up, readable formatting. I hacked it together on valtown with copious help from an LLM over a weekend; please propose changes or edits, as I'm sure I missed many use-cases and edge-cases. This app runs entirely in your browser and does not send your data anywhere.

Another website attempting similar things is at slack-copy-paste.danielna.com.

Instructions

In Slack, start selecting at the name of the sender of the first message, end after the last message but before the textbox.

For threaded conversations: You can copy either just the main messages (which will show thread indicators like \"3 replies\"), or copy from within a thread view to get the individual threaded replies. Messages sent from thread to main channel will be marked with 📢.

In this app, you can just press the ➡️ button and then paste your message in the other app, or you can manually paste in the textbox and then copy either markdown or rendered html elsewhere if you like.

For Beeper: Simply copy and paste the text messages directly from Beeper. The app will automatically detect the format and group messages from the same sender (unless more than 1 hour apart).

Paste content from Slack or Beeper here

\n \n

Raw Markdown output

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Rendered Markdown output

\n \n

\n\n \n\n\n`;\n\nexport default async function(req: Request) {\n return new Response(html, {\n headers: {\n \"Content-Type\": \"text/html; charset=utf-8\",\n },\n });\n}",[],[173],"files",[151,171],"counts",{"_184":32,"_185":186,"_187":186,"_188":32},"pulls","branches",1,"forks","envVars","contents",[],{"_103":152,"_95":99,"_153":154,"_155":-5,"_156":139,"_157":158,"_159":117,"_105":192,"_100":161,"_162":163,"_164":165,"_166":22,"_167":-5,"_98":193},["D",1756232786211],[99],"upstreamProject","upstreamBranch","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name.branch.$branch.history_.$",{"_93":94,"_95":96,"_97":43,"_98":99,"_101":202,"_163":207,"_210":211,"_241":242,"_250":-7,"_251":32,"_252":22},{"_103":104,"_95":96,"_105":203,"_107":-5,"_108":22,"_109":110,"_111":-5,"_112":-5,"_14":113,"_114":115,"_116":117,"_118":-5,"_119":32,"_16":120,"_121":122,"_123":122,"_124":125,"_126":125,"_127":125,"_128":122,"_129":122,"_23":204,"_133":205,"_136":206,"_148":22},["D",1746280438677],{"_93":94,"_131":132},{"_93":94,"_135":132},{"_100":138,"_95":43,"_103":139,"_140":104,"_141":-5,"_142":-5,"_143":-5,"_144":-5,"_145":-5,"_146":96,"_147":94},{"_103":152,"_95":99,"_153":154,"_155":-5,"_156":139,"_157":158,"_159":117,"_105":208,"_100":161,"_162":163,"_164":165,"_166":22,"_167":-5,"_98":209},["D",1756232786211],[99],"history",[212,214,220,226,232,237],{"_103":152,"_156":139,"_153":154,"_95":99,"_164":165,"_162":163,"_100":161,"_155":-5,"_105":213,"_157":158,"_167":-5},["D",1756232786211],{"_103":215,"_156":139,"_153":154,"_95":99,"_164":216,"_162":163,"_100":217,"_155":-5,"_105":218,"_157":219,"_167":-5},"9ea6cf06-7e47-11f0-acf1-0224a6c84d84","# Paste messages from Slack or Beeper, get clean markdown\n\nThis little webapp is intended to make it easier to copy messages from Slack or Beeper into other places for sharing or archival, with cleaned-up, readable formatting. I hacked it together on valtown with copious help from an LLM over a weekend; please propose changes or edits, as I'm sure I missed many use-cases and edge-cases. This app runs entirely in your browser and does not send your data anywhere.\n\n## Features\n\n- **Clean markdown conversion**: Converts Slack's HTML and Beeper's text to readable markdown format\n- **Multiple format support**: Automatically detects and handles both Slack HTML and Beeper text formats\n- **Message grouping**: For Beeper, combines successive messages from the same person unless they're >1 hour apart\n- **Thread support**: Handles threaded conversations with visual indicators (Slack)\n - Shows thread reply counts (e.g., \"Thread: 3 replies (Last reply today at 19:03)\")\n - Marks threaded replies with ↳ prefix\n - Identifies messages sent from thread to main channel with 📢 prefix\n- **Code block preservation**: Maintains formatting for inline code and code blocks\n- **List handling**: Properly converts ordered and unordered lists\n- **Timestamp formatting**: Clean, consistent timestamp display\n\n## Beeper Format Support\n\nThe app now supports Beeper's message format:\n```\n[8/20/2025, 4:39:00 PM] Han Wang: Let me know how this agreement looks!\n[8/20/2025, 11:17:49 PM] Alex Rattray: Hey really sorry for the delay.\n[8/20/2025, 11:17:57 PM] Alex Rattray: At first glance it looks great to me!\n```\n\nThis gets converted to:\n```markdown\n[8/20/2025, 4:39:00 PM] **Han Wang:**\n> Let me know how this agreement looks!\n\n[8/20/2025, 11:17:49 PM] **Alex Rattray:**\n> Hey really sorry for the delay.\n\n> At first glance it looks great to me!\n```\n\n### Beeper Features:\n- **Automatic format detection**: Just paste Beeper text and it will be recognized\n- **Message grouping**: Combines consecutive messages from the same sender\n- **Time-based separation**: Creates new groups if messages are >1 hour apart\n- **Clean formatting**: Bold names, blockquoted content, proper spacing\n\n## Thread Handling\n\nThe app now better handles Slack's threaded conversations:\n\n1. **Main messages with threads**: When you copy a main channel message that has replies, it will show thread information like \"*Thread: 3 replies (Last reply today at 19:03)*\"\n\n2. **Individual thread replies**: When copying from within a thread view, individual replies are marked with \"↳\" to show they're threaded responses\n\n3. **Thread-to-channel broadcasts**: Messages sent from a thread to the main channel are marked with \"📢\" to indicate they were broadcast\n\n4. **Reply context**: When a message is replying to another message, it will show the context with a 💬 emoji:\n ```markdown\n __↳ Alex Rattray__ [2025-07-24 07:03 PM EST]:\n > 💬 **John Doe**: Thanks this is a great update. Wasn't aware of the Apps bugs actually…\n > hmm… what are some themes you're seeing? is it like, ugly UX? frontend bugs? backend bugs? other?\n ```\n\n## Usage Tips\n\n- **For Slack complete thread context**: Copy from within the thread view in Slack to get individual replies with their context\n- **For Slack thread summaries**: Copy from the main channel to see which messages have threads\n- **For Beeper**: Simply copy and paste the text directly - the app will automatically group messages and format them cleanly\n- **Mixed conversations**: The app handles both threaded and non-threaded messages in the same selection\n\n![Screenshot 2024-06-24 at 08.49.45@2x.png](https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/3ff8b415-ba7f-439c-458c-5c9c833e4b00/public)\n",4,["D",1755750651783],264,{"_103":221,"_156":139,"_153":154,"_95":99,"_164":222,"_162":163,"_100":223,"_155":-5,"_105":224,"_157":225,"_167":-5},"99556742-7e47-11f0-9aa9-0224a6c84d84","# Paste messages from Slack or Beeper, get clean markdown\n\nThis little webapp is intended to make it easier to copy messages from Slack or Beeper into other places for sharing or archival, with cleaned-up, readable formatting. I hacked it together on valtown with copious help from an LLM over a weekend; please propose changes or edits, as I'm sure I missed many use-cases and edge-cases. This app runs entirely in your browser and does not send your data anywhere.\n\n## Features\n\n- **Clean markdown conversion**: Converts Slack's HTML and Beeper's text to readable markdown format\n- **Multiple format support**: Automatically detects and handles both Slack HTML and Beeper text formats\n- **Message grouping**: For Beeper, combines successive messages from the same person unless they're >1 hour apart\n- **Thread support**: Handles threaded conversations with visual indicators (Slack)\n - Shows thread reply counts (e.g., \"Thread: 3 replies (Last reply today at 19:03)\")\n - Marks threaded replies with ↳ prefix\n - Identifies messages sent from thread to main channel with 📢 prefix\n- **Code block preservation**: Maintains formatting for inline code and code blocks\n- **List handling**: Properly converts ordered and unordered lists\n- **Timestamp formatting**: Clean, consistent timestamp display\n\n## Beeper Format Support\n\nThe app now supports Beeper's message format:\n```\n[8/20/2025, 4:39:00 PM] Han Wang: Let me know how this agreement looks!\n[8/20/2025, 11:17:49 PM] Alex Rattray: Hey really sorry for the delay.\n[8/20/2025, 11:17:57 PM] Alex Rattray: At first glance it looks great to me!\n```\n\nThis gets converted to:\n```markdown\n[8/20/2025, 4:39:00 PM] **Han Wang:**\n> Let me know how this agreement looks!\n\n[8/20/2025, 11:17:49 PM] **Alex Rattray:**\n> Hey really sorry for the delay.\n\n> At first glance it looks great to me!\n```\n\n### Beeper Features:\n- **Automatic format detection**: Just paste Beeper text and it will be recognized\n- **Message grouping**: Combines consecutive messages from the same sender\n- **Time-based separation**: Creates new groups if messages are >1 hour apart\n- **Clean formatting**: Bold names, blockquoted content, proper spacing\n\n## Thread Handling\n\nThe app now better handles Slack's threaded conversations:\n\n1. **Main messages with threads**: When you copy a main channel message that has replies, it will show thread information like \"*Thread: 3 replies (Last reply today at 19:03)*\"\n\n2. **Individual thread replies**: When copying from within a thread view, individual replies are marked with \"↳\" to show they're threaded responses\n\n3. **Thread-to-channel broadcasts**: Messages sent from a thread to the main channel are marked with \"📢\" to indicate they were broadcast\n\n4. **Reply context**: When a message is replying to another message, it will show the context with a 💬 emoji:\n ```markdown\n __↳ Alex Rattray__ [2025-07-24 07:03 PM EST]:\n > 💬 **John Doe**: Thanks this is a great update. Wasn't aware of the Apps bugs actually…\n > hmm… what are some themes you're seeing? is it like, ugly UX? frontend bugs? backend bugs? other?\n ```\n\n## Usage Tips\n\n- **For complete thread context**: Copy from within the thread view in Slack to get individual replies with their context\n- **For thread summaries**: Copy from the main channel to see which messages have threads\n- **Mixed conversations**: The app handles both threaded and non-threaded messages in the same selection\n\n![Screenshot 2024-06-24 at 08.49.45@2x.png](https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/3ff8b415-ba7f-439c-458c-5c9c833e4b00/public)\n",3,["D",1755750642864],263,{"_103":227,"_156":139,"_153":154,"_95":99,"_164":228,"_162":163,"_100":229,"_155":-5,"_105":230,"_157":231,"_167":-5},"3ac59ec6-6836-11f0-a044-0224a6c84d84","# Paste messages from Slack, get clean markdown\n\nThis little webapp is intended to make it easier to copy messages from Slack into other places for sharing or archival, with cleaned-up, readable formatting. I hacked it together on valtown with copious help from an LLM over a weekend; please propose changes or edits, as I'm sure I missed many use-cases and edge-cases. This app runs entirely in your browser and does not send your data anywhere.\n\n## Features\n\n- **Clean markdown conversion**: Converts Slack's HTML to readable markdown format\n- **Thread support**: Handles threaded conversations with visual indicators\n - Shows thread reply counts (e.g., \"Thread: 3 replies (Last reply today at 19:03)\")\n - Marks threaded replies with ↳ prefix\n - Identifies messages sent from thread to main channel with 📢 prefix\n- **Code block preservation**: Maintains formatting for inline code and code blocks\n- **List handling**: Properly converts ordered and unordered lists\n- **Timestamp formatting**: Clean, consistent timestamp display\n\n## Thread Handling\n\nThe app now better handles Slack's threaded conversations:\n\n1. **Main messages with threads**: When you copy a main channel message that has replies, it will show thread information like \"*Thread: 3 replies (Last reply today at 19:03)*\"\n\n2. **Individual thread replies**: When copying from within a thread view, individual replies are marked with \"↳\" to show they're threaded responses\n\n3. **Thread-to-channel broadcasts**: Messages sent from a thread to the main channel are marked with \"📢\" to indicate they were broadcast\n\n4. **Reply context**: When a message is replying to another message, it will show the context with a 💬 emoji:\n ```markdown\n __↳ Alex Rattray__ [2025-07-24 07:03 PM EST]:\n > 💬 **John Doe**: Thanks this is a great update. Wasn't aware of the Apps bugs actually…\n > hmm… what are some themes you're seeing? is it like, ugly UX? frontend bugs? backend bugs? other?\n ```\n\n## Usage Tips\n\n- **For complete thread context**: Copy from within the thread view in Slack to get individual replies with their context\n- **For thread summaries**: Copy from the main channel to see which messages have threads\n- **Mixed conversations**: The app handles both threaded and non-threaded messages in the same selection\n\n![Screenshot 2024-06-24 at 08.49.45@2x.png](https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/3ff8b415-ba7f-439c-458c-5c9c833e4b00/public)\n",2,["D",1753324257188],253,{"_103":233,"_156":139,"_153":154,"_95":99,"_164":234,"_162":163,"_100":186,"_155":-5,"_105":235,"_157":236,"_167":-5},"619c9fa2-6833-11f0-bfec-0224a6c84d84","# Paste messages from Slack, get clean markdown\n\nThis little webapp is intended to make it easier to copy messages from Slack into other places for sharing or archival, with cleaned-up, readable formatting. I hacked it together on valtown with copious help from an LLM over a weekend; please propose changes or edits, as I'm sure I missed many use-cases and edge-cases. This app runs entirely in your browser and does not send your data anywhere.\n\n## Features\n\n- **Clean markdown conversion**: Converts Slack's HTML to readable markdown format\n- **Thread support**: Handles threaded conversations with visual indicators\n - Shows thread reply counts (e.g., \"Thread: 3 replies (Last reply today at 19:03)\")\n - Marks threaded replies with ↳ prefix\n - Identifies messages sent from thread to main channel with 📢 prefix\n- **Code block preservation**: Maintains formatting for inline code and code blocks\n- **List handling**: Properly converts ordered and unordered lists\n- **Timestamp formatting**: Clean, consistent timestamp display\n\n## Thread Handling\n\nThe app now better handles Slack's threaded conversations:\n\n1. **Main messages with threads**: When you copy a main channel message that has replies, it will show thread information like \"*Thread: 3 replies (Last reply today at 19:03)*\"\n\n2. **Individual thread replies**: When copying from within a thread view, individual replies are marked with \"↳\" to show they're threaded responses\n\n3. **Thread-to-channel broadcasts**: Messages sent from a thread to the main channel are marked with \"📢\" to indicate they were broadcast\n\n![Screenshot 2024-06-24 at 08.49.45@2x.png](https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/3ff8b415-ba7f-439c-458c-5c9c833e4b00/public)\n",["D",1753323033865],247,{"_103":238,"_156":139,"_153":154,"_95":99,"_164":239,"_162":163,"_100":32,"_155":-5,"_105":240,"_157":186,"_167":-5},"0fc58db2-2826-11f0-af78-569c3dd06744","# Paste messages from Slack, get clean markdown\n\nThis little webapp is intended to make it easier to copy messages from Slack into other places for sharing or archival, with cleaned-up, readable formatting. I hacked it together on valtown with copious help from an LLM over a weekend; please propose changes or edits, as I'm sure I missed many use-cases and edge-cases. This app runs entirely in your browser and does not send your data anywhere.\n\n![Screenshot 2024-06-24 at 08.49.45@2x.png](https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/3ff8b415-ba7f-439c-458c-5c9c833e4b00/public)\n",["D",1719100620893],"versions",[243,245,246,247,248,249],{"_163":212,"_244":214},"previous",{"_163":214,"_244":220},{"_163":220,"_244":226},{"_163":226,"_244":232},{"_163":232,"_244":237},{"_163":237,"_244":-5},"versionNumber","page","hasNext","actionData","errors"]

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