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Sendly Icon Platform Engine

Discover the Zero-Knowledge and Peer-to-Peer architecture powering our suite of developer and productivity tools.

Secure File Transfer

Using military-grade AES encryption directly in your browser. We never see your files, and they are instantly deleted the moment they are downloaded.

1. Upload & Encrypt

Select files up to 500MB. Add a password to mathematically lock your file before it ever leaves your device.

2. Get Your Key

We generate a single-use 6-digit key. Your scrambled file waits on our server, unreadable to us.

3. Decrypt Locally

The receiver enters the key and password. The file unlocks directly in their browser.

Live Screen Mirror

Zero-latency, peer-to-peer screen sharing using raw WebRTC protocols. No software downloads or browser extensions required.

1. Capture Screen

Your browser securely accesses your system's Display Media API to capture a window or entire monitor.

2. P2P Handshake

We use Socket.io to exchange ICE candidates and establish a direct route between the two computers.

3. Direct Stream

The video feed bypasses our servers completely, streaming directly from your computer to the viewer.

Collaborative Notepad

Real-time multiplayer text editing. We use sub-millisecond WebSocket events to sync cursors and HTML elements across multiple devices instantly.

1. Open Workspace

Instantly spin up a rich-text content editable environment attached to a secure WebSockets room.

2. Invite Peers

Share your access key. Colleagues instantly join your exact session without needing accounts.

3. Instant Sync

Every keystroke emits a tiny data packet, calculating exact cursor offsets to prevent layout jumping.

Zero-Knowledge JSON Formatter

Offline CodeMirror data processing. You can safely paste massive, sensitive database payloads without fear of data leakage.

1. Local Import

Paste messy or minified JSON code directly into the browser. The data never hits a backend network.

2. Offline Formatting

Our integrated CodeMirror engine uses pure client-side Javascript to instantly beautify the code.

3. Export Safely

Copy the formatted string or generate an instant local .json file download from the browser memory.