Embed

Hide a payload inside ordinary text

Supabase is not configured — lab works anonymously. Copy .env.example → .env, run the SQL migration, then restart.

Password

Recommended · hybrid · interleave ×3 · ECC medium

Advanced options

Cover text Watermark payload

Capacity —

Watermarked output

Codepoint dump

Watermarked text

Recovered watermark

Text to inspect

Aggressive (emoji joiners & presentation selectors)

Original

Watermarked

Session

Not signed in

Email Password

Display name

API keys

Use Authorization: Bearer tm_… for programmatic access.

Watermark history

Previews only — full cover/payload are never stored.

API

POST /api/v1/auth/register
POST /api/v1/auth/login
GET  /api/v1/auth/me
POST /api/v1/keys
GET  /api/v1/keys
DELETE /api/v1/keys/:id
POST /api/v1/embed|extract|analyze|strip|capacity|compare
GET  /api/v1/watermarks

Techniques: zero-width, unicode-tags, whitespace,
trailing-whitespace, homoglyph, punctuation,
variation-selector, hybrid

Frame TMK2 · ECC TME1 (default medium)