logoJSON Reader

Code Share — Real-Time Collaborative Code Editor

Share code with a link and edit together live. Watch cursors move, chat, and run the code for everyone — in your browser, free and without signup.

Real-time collaborative editor

Start a code share in one click

Get a link, send it to anyone, and edit together live — with cursors, chat, and a shared Run button. No signup.

Why use JSON Reader Code Share?

Live cursors & selections

See exactly where everyone is typing, with their name and colour.

Run code together

Execute JavaScript, Python, Java, C, C++, Go, Rust and more — output streams to everyone in the room.

Built-in chat

Discuss changes without leaving the editor.

Owner lock

The creator can make the room view-only for guests — perfect for interviews and teaching.

Never lose an edit

Conflict-free real-time sync that survives flaky Wi-Fi and reconnects automatically.

Persistent links

Rooms are saved and stay available for 30 days after the last edit.

How it works

  1. Pick a language and click Create share link.
  2. Press Share to copy the link and send it to your team, student or candidate.
  3. Everyone edits the same document in real time; press Run to execute it for the whole room.

Frequently Asked Questions

Everything you need to know about JSON Reader

No. Click Create share link, copy the URL and send it — anyone with the link can join instantly.
JavaScript, TypeScript, Python, Java, C, C++, Go, Rust, Ruby, PHP and Bash. Many more languages are available for syntax highlighting.
Yes. The person who created the room can lock it, making it view-only for everyone else, and unlock it at any time.
A room stays available for 30 days after its last change.
Code runs in an isolated sandbox with no network access and strict CPU, memory and time limits.