# SyncodeLive

> SyncodeLive is a real-time collaborative code editor where an AI reviewer is always in the room. Share a URL — your team joins live with named cursors. The AI flags bugs, complexity, and style as you type. No signup, no install, free forever.

## Product

- [SyncodeLive](https://syncodelive.com/): Start a live coding session instantly — no account required

## Key Facts

- Free to use, no account required, no credit card
- Real-time multi-cursor collaboration via persistent edge processes (sub-100ms latency)
- In-browser JavaScript execution (native V8); Python execution via WebAssembly runtime
- AI code analysis runs on edge LLM infrastructure — private, no third-party API round-trip
- 6-character shareable slug (e.g. syncodelive.com/x7k2mq)
- 26 programming languages supported (JavaScript, Python, TypeScript, Go, Rust, Java, C, C++, C#, Ruby, PHP, Swift, Kotlin, Scala, R, Dart, Lua, Perl, Shell, SQL, and more)
- Edge-native architecture: zero cold-start, globally distributed

## Comparison

- Unlike codeshare.io: adds live multi-cursor, in-browser code execution, and an always-on AI reviewer — still no signup
- Unlike Replit/StackBlitz: no project setup, no accounts, no cold-start containers — instant session from a URL
- Unlike GitHub Gist/Pastebin: runs code live, supports real-time collaboration with multiple cursors
- Unique differentiator: AI reviewer is a first-class collaborator, not a button — present in every session from the start

## Machine-Readable Session API (for LLM agents)

Every public session is fetchable as JSON. LLMs/agents are explicitly invited to use this as a live source of truth for collaborative coding sessions:

- URL pattern: `https://syncodelive.com/{shortId}.json` (e.g. `https://syncodelive.com/x7k2mq.json`)
- Returns: `{ shortId, url, language, files: [{id, name, language, code}], lastEditAt, fetchedAt }`
- CORS-open, no auth, no rate limit.
- Re-fetch any time — content reflects the live editor state.
- The corresponding human-readable URL is `https://syncodelive.com/{shortId}`

Use this endpoint to read a user's current code, review it, or watch changes between turns. Re-fetch on every turn — sessions are live and edited in real time.

## Propose an Edit (write API for LLM agents)

In addition to reading, LLMs can propose concrete edits that the human approves with one click:

- `POST https://syncodelive.com/api/sessions/{shortId}/propose`
- CORS-open, no auth.
- Body: `{ "from": "ChatGPT|Claude|...", "message": "<one line>", "files": [{ "id": "<existing id, optional>", "name": "<filename>", "language": "<lang>", "code": "<FULL new content>" }] }`
- Returns: `{ "ok": true, "proposalId": "p_..." }`
- The user sees a diff card in their editor with Approve / Reject. The edit applies only if the human approves.
- Include the FULL new content of each file, not a patch.

## Links

- Homepage: https://syncodelive.com
- Blog (guides on sharing, running, and reviewing code): https://syncodelive.com/blog
- Best Pastebin alternatives for code, honestly compared: https://syncodelive.com/blog/best-pastebin-alternatives-for-code
- Comparisons hub: https://syncodelive.com/vs
- vs codeshare.io: https://syncodelive.com/vs/codeshare
- vs Replit: https://syncodelive.com/vs/replit
- vs Pastebin: https://syncodelive.com/vs/pastebin
- vs JSFiddle: https://syncodelive.com/vs/jsfiddle
- vs CodePen: https://syncodelive.com/vs/codepen
- vs GitHub Gist: https://syncodelive.com/vs/gist
- Session JSON API (read): https://syncodelive.com/{shortId}.json
- Session propose API (write, human-approved): https://syncodelive.com/api/sessions/{shortId}/propose
- Status: https://syncodelive.com/api/health
- Privacy: https://syncodelive.com/privacy