RelateDB

Offline-first schema designer

Unlimited local projects
Offline-first
Import SQL/DBML
Export SQL/DBML
Snapshots
Migration SQL

Design database schemas visually — even offline.

RelateDB is a browser-based ERD studio for modeling tables, columns, and relationships. Everything is free and unlimited locally.

Local usage

Unlimited

Versioning

Snapshots

Share

Read-only links

Schema Preview

Offline-ready

Workspace

3 schemas

  • public
    • 3 tables
    • users
    • sessions
    • audit_log
  • billing
    • 3 tables
    • customers
    • invoices
    • payments
  • analytics
    • 3 tables
    • events
    • properties
    • rollups

Import

DBML or SQL CREATE TABLE

Export

Postgres/MySQL + DBML

FEATURES

Everything you need for schema design

A fast canvas for modeling + thoughtful productivity features for real projects.

Visual ERD canvas

Tables as nodes, relations as edges. Drag, select, edit, and keep the big picture visible across schemas.

Offline-first

Work persists locally via IndexedDB-backed storage. Refresh, reopen, and continue without servers.

Import

Bring in DBML or SQL CREATE TABLE, then refine visually and keep schemas organized in workspaces.

Export

Export SQL for Postgres/MySQL, export DBML, render the canvas to PNG/JPG/SVG, or create a read-only share link (including snapshots).

Auto-layout

ELK-based auto layout per schema with packing across schemas, aligned to sidebar order — with lock-position support.

Version history

Save snapshots, rename them, export them, and compare versions against your current schema with visual diffs.

Backups + migration SQL

Export workspace backups (.relatedb.json) and generate Postgres/MySQL migration SQL between versions.

WORKFLOW

From idea → schema → export

A smooth loop for iterating quickly, keeping it consistent, and shipping confidently.

01
Draft on the canvas
Create tables, columns, and relationships. Add notes and areas for context.

02
Organize by workspace
Split work into schemas. Keep an active schema while still visualizing cross-schema structure.

03
Export & share
Generate SQL/DBML, migration SQL, backups, export diagram images, or share a read-only link for reviews (including snapshot versions).

Try it in your browser

Open Studio and start modeling immediately.

CAPABILITIES

Unlimited locally.

RelateDB is free to use with no limits for local-first work.

  • Free
  • Unlimited local-first studio.
  • $0
  • Unlimited workspaces, schemas, and tables
  • Offline-first persistence (IndexedDB)
  • Import DBML + SQL
  • Export SQL/DBML + diagram images
  • Read-only public share links (including snapshots)
  • Schema snapshots + version history
  • Migration SQL + workspace backups

Pro

Sync across devices.

  • $5.99/mo
  • Cloud sync across devices
  • Faster onboarding across machines
  • Ready for future collaboration features

FAQ

Common questions

Is this actually offline-first?

Yes — state persists locally (IndexedDB-backed). You can refresh/reopen and keep working without a server.

Do I need an account?

No. Everything runs locally in your browser.

Can I import an existing schema?

Yes — import DBML or SQL CREATE TABLE and continue editing visually.

Can I export to Postgres/MySQL?

Yes — export SQL for Postgres/MySQL and export DBML at the schema or workspace level.

Can I save versions and generate migrations?

Yes — save schema snapshots, compare versions, and export Postgres/MySQL migration SQL between snapshots and/or the current schema.

Can I back up my workspace?

Yes — export a .relatedb.json workspace backup and restore it later via the Import modal.