ErdDocs / pricing
Pricing
Drawing diagrams and exporting them is free and always will be. You pay only when a schema has more than 25 tables or you need the full data dictionary. The license is $9, paid once, with no subscription.
Free
$0
No signup, no install, no card.
- Schemas up to 25 tables in full. Larger ones are read too, with the extra tables shown locked
- All ten formats: SQL (PostgreSQL, MySQL, SQL Server, SQLite), Prisma, DBML, Mermaid, PlantUML and ORM models
- Drag tables, light up relations, hide what you do not need and send the diagram as a link
- Export to PNG, SVG, Mermaid, DBML, PlantUML and SQL, with a small ErdDocs logo
- Data dictionary: the three main tables described in full
Lifetime license
$9
Everything in the free version, plus:
- Schemas of any size in full: 1,000 tables as readily as 10
- The complete data dictionary for every table, saved as PDF
- Export without the ErdDocs logo
- The key is checked right in your browser: no account, and it works offline
- No renewal
Prices exclude VAT and sales tax; Paddle adds them at checkout where they apply. 14-day refund, no questions asked.
What “lifetime” means here
One payment, no renewal, no expiry date. A license already bought is never turned into a subscription and never downgraded, and later price rises do not reach back to it. We cannot promise that a website runs forever, so the licensed features are the ones that exist when you buy. Once your browser has been unlocked, the tool keeps working offline, because the key is verified there rather than by us.
Payment, tax and refunds
Orders are processed by Paddle, which is the merchant of record. You buy from Paddle (Paddle.com Market Ltd or its local entity), and we license the software to you. Paddle takes the payment, adds VAT or sales tax where your country requires it, shows the total before you confirm, and issues the invoice. Prices on this page exclude tax. We never see or store card details.
If it turns out not to be what you needed, write within 14 days and we refund it, no questions asked. The full policy is on the Refunds page, and the Terms cover the rest.
Questions people ask before paying
Is there a subscription?
No. $9 is paid once and the license does not expire or renew. There is no plan to move to and no automatic charge to your card later, because no card is kept on file with us. The payment processor does not even hand us one.
What happens to my license when the price goes up?
Nothing. The price is an introductory one and will rise, but a license already bought is never converted into a subscription, downgraded, or re-priced.
Do I need an account?
There is no account to make. After payment you receive a signed license key by email. Pasting it into the tool unlocks that browser. Your browser verifies the signature locally, so unlocking keeps working offline and would survive our servers going away.
Can I use it on more than one machine?
Yes. The key is yours, so activate it in the browsers you work in. The key is personal: do not give it to other people. It carries the email address it was issued to. Lost keys are re-issued free to the email on the order.
Is there a free trial?
The free tier is the trial, and it does not end. Schemas up to 25 tables render in full, forever, without a card. Larger schemas are parsed completely as well, and the tables past the limit appear as locked placeholders. So you can see the shape of what a license would show you before paying for it.
How will the charge show on my statement?
A card statement shows it as PADDLE.NET* DIAGRAMPRO. If you paid with PayPal, it shows as PAYPAL *PADDLE.NET. Paddle takes the payment and emails you the receipt. If you cannot find it, enter the email you paid with on paddle.net and Paddle will look up the purchase.
Unlock the full schema and the complete data dictionary
$9, a one-time payment with no subscription. The key arrives by email right after payment, and if it is not what you needed, we refund it within 14 days.
Not sure yet? Paste your own schema and see it for free.