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- Free
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Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
- Free
- No sign-up
- Works on any device
Fill in the details to see your QR code.
PNG for phones, chats and websites. SVG and PDF stay sharp at any size, which is best for printing. Tip: point your phone camera at the preview to test it.
3. Style (optional): colors, dots, logo
Choose a photo or screenshot or drag it here
Works with photos of printed codes, screenshots and image files.
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JSON Schema generator and validator
Make a JSON Schema from a sample, or check your JSON against a schema.
- Free
- No sign-up
- Works on any device
About JSON Schema generator and validator
Paste a sample JSON document and get a draft JSON Schema describing its types, properties and required fields, or paste a schema and validate your data against it. A generated schema is a starting point: tighten it with formats, ranges and patterns before using it for contracts.
How to use JSON Schema generator and validator
- Paste a sample of your JSON.
- Generate the schema, or paste a schema to validate against.
- Read the schema or the list of validation errors.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
What is JSON Schema used for?
It describes the expected shape of JSON, so APIs, forms and config files can be validated automatically, with clear errors on bad data.
Is a generated schema final?
No, it is a starting point inferred from one sample. Add required fields, formats and limits by hand, and test it against more examples.
Why does validation fail on a field that looks right?
Look at the type. A number written as text in quotes fails a number rule. Check the error path to find the exact field.
Is JSON Schema generator and validator free?
Yes. JSON Schema generator and validator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.