sher — deploy to a live preview URL

sher is a CLI that builds your frontend project, uploads it, and returns a live preview URL. One command. No accounts. No config.

Use it after you've built or scaffolded a frontend project and the user wants to see it live.

Install

Global (recommended for agents):

npm i -g shersh

Or one-off with npx:

npx shersh link

Deploy

From the project root:

sher link

That's it. sher auto-detects the framework, runs the build, uploads the output, and returns a URL.

Options

Examples

# Standard deploy
sher link

# Deploy a pre-built project
sher link --no-build

# Deploy a specific output directory
sher link --dir ./dist

# Short-lived link (2 hours)
sher link --ttl 2

Parsing the output

The CLI prints the live URL to stdout in this format:

  https://a8xk2m1p.sher.sh  (copied)
  expires 2/19/2026, 11:00 AM

The URL always matches the pattern https://[a-z0-9]{8}.sher.sh. Extract it with:

https://[a-z0-9]{8}\.sher\.sh

The URL is also automatically copied to the clipboard.

After deploying

Present the URL to the user:

Your preview is live at https://a8xk2m1p.sher.sh

If you set a --ttl, mention when it expires. If using --pass, share the password too.

Supported frameworks

sher auto-detects and builds:

• Vite — outputs to dist/
• Next.js — auto-configures static export, outputs to out/
• Astro — outputs to dist/
• Create React App — outputs to build/
• Any project with a build script that produces dist/, build/, or out/
• Static HTML — no build needed, use --dir . to upload directly

Agent-friendly by default

• No browser opens after deploy
• No interactive prompts
• No account required for basic usage (1 deploy, 10MB max, 6h TTL)
• Authenticated users get 25 deploys, 50MB, 24h TTL
• Exit code 0 on success, non-zero on failure

Troubleshooting

If sher link fails:

1. No build script — the project needs a build script in package.json, or use --dir to point to pre-built output
2. Build error — fix the build error first, then retry
3. Size limit — the upload is too large (10MB anonymous, 50MB authenticated, 100MB Pro)
4. No output directory — ensure the build produces dist/, build/, or out/, or specify --dir