SchemaLens Pro Tour — See What You're Missing

Free vs Pro

Unlimited schema comparisons

The free tier stops at 15 tables. Most production schemas have 30, 50, or 200+ tables. Pro handles them all.

Diff schemas of any size — no table limits
Compare entire databases, not just snippets
Batch-process multi-schema migrations

Try the free tier first →

Visual Diff Free limit reached

users — 4 columns added

orders — 2 columns modified

old_logs — table removed

audit_trail — new table

🔒 23 more tables hidden — Unlock Pro

Pro Feature

Complete migration scripts

Free shows a preview. Pro generates the full ALTER TABLE script for every change — copy, paste, deploy.

Forward migration: get from old schema to new
Rollback migration: reverse every change safely
All 5 dialects: PostgreSQL, MySQL, SQLite, SQL Server, Oracle

Migration SQL

ALTER TABLE users ADD COLUMN phone VARCHAR(20);
ALTER TABLE users ADD COLUMN preferences JSONB DEFAULT '{}';
ALTER TABLE orders ALTER COLUMN total TYPE DECIMAL(12,2);
CREATE INDEX CONCURRENTLY idx_users_phone ON users(phone);
CREATE TABLE audit_logs (...);

✓ 12 changes generated PostgreSQL dialect

Pro Feature

Breaking change detection

Pro scans every diff for production-killing changes: dropped columns, type mismatches, lost constraints. Each diff gets a risk score.

0–100 risk score on every comparison
Flags dropped columns referenced by views
Warns on NOT NULL additions without defaults
Detects unsafe index drops

Risk Assessment

72/100

High Risk

⚠️ BREAKING CHANGE

Dropped column legacy_id is referenced by view user_profiles. The view will fail after deployment.

⚠️ WARNING

Adding NOT NULL to email without a DEFAULT will fail on existing rows.

Pro Feature

Export to Markdown, PDF & JSON

Share schema reviews with your team in the format they prefer. Perfect for PR descriptions, compliance docs, and Slack updates.

Markdown: paste directly into GitHub PRs
PDF: attach to compliance or audit records
JSON: pipe into CI/CD pipelines
SQL: run migrations immediately

Export

📋 Markdown

📄 PDF

{ } JSON

🐬 PostgreSQL

🐬 MySQL

📦 SQLite

## Schema Diff Report

**Tables:** 3 added, 2 modified, 1 removed
**Risk Score:** 72/100 (High)
**Breaking Changes:** 2

### Changes
| Table | Change | Type |
|-------|--------|------|
| users | +phone | Added |
| orders | ~total | Modified |

Pro Feature

Rollback safety net

Every Pro migration includes a reverse script. If your deploy goes wrong, you have the exact commands to undo it — tested and ready.

Auto-generated rollback for every change
Preserves original column types and constraints
Handles table recreations safely

Rollback SQL Auto-generated

-- Reverse all changes if deployment fails
ALTER TABLE users DROP COLUMN phone;
ALTER TABLE users DROP COLUMN preferences;
ALTER TABLE orders ALTER COLUMN total TYPE DECIMAL(10,2);
DROP INDEX idx_users_phone;
DROP TABLE audit_logs;

Pro Feature

Shareable diff links

Generate a permanent link to any schema comparison. Send it to teammates for async review — no screenshots, no copy-paste.

See what Pro unlocks

Unlimited schema comparisons

Complete migration scripts

Breaking change detection

Export to Markdown, PDF & JSON

Rollback safety net

Shareable diff links

One payment. Forever.