Zod Validator & Playground
Why Use an Online Zod Playground?
Zod is powerful, but writing complex validation logic (like regex patterns, refinements, or nested arrays) can be tricky. Instead of running your entire backend server just to test a small validation change, use this Zod Validator Playground.
It runs the actual Zod library right in your browser. This tool helps you debug runtime errors before they crash your production app.
Instantly identify why safeParse is failing. See the exact path and error code.
Verify if z.coerce.number() correctly handles strings like “100” or “100.50”.
Paste full files with import statements. We automatically strip them for you.
z object directly in the editor. Standard methods like z.string(), z.number(), z.array(), and z.object() work out of the box.How to Use This Tool
1. Define Your Schema
In the left panel, write your schema. You can type z.object(...) directly. If you have code from our JSON to Zod Generator, you can paste the full code (including import statements)—our tool automatically cleans it up.
2. Input Your Data
In the right panel, paste the JSON object you want to test. This represents the data coming from your API or Form.
3. Interpret Results
Click “Validate Schema”. If the data matches, you will see a green Valid badge. If it fails, you will get a list of specific errors.
Common Validation Errors
| Error Code | Why it Happens | How to Fix |
|---|---|---|
invalid_type | Received string when expecting number. | Use z.coerce.number() to force conversion. |
required | A field is missing from the input JSON. | Add .optional() to the field in your schema. |
unrecognized_keys | Extra fields found (if using .strict()). | Remove .strict() or use .strip() mode. |
Frequently Asked Questions
Can I use .refine() or .transform()?
Yes! Since we evaluate the code using the real Zod library, you can use advanced features like .refine(val => val > 10) or .transform(val => val.length).
Is the execution safe?
We execute the schema code in your browser’s local sandbox. However, you should never paste malicious code from untrusted sources into the schema editor, as it executes JavaScript.