Question 1

How do I convert JSON to YAML?

Accepted Answer

Use the Convert tab in JSON/YAML Toolkit. Paste your JSON in the input field, select 'YAML' as output format, and the converted YAML will appear instantly. You can also paste YAML and convert it to JSON.

Question 2

How do I compare two JSON or YAML files?

Accepted Answer

Use the Diff tab. Paste your original JSON/YAML on the left and the new version on the right. The tool auto-detects the format and shows all differences including added, removed, and modified keys in a visual tree view. You can even compare JSON vs YAML!

Question 3

How do I decode a JWT token?

Accepted Answer

Use the JWT tab and select Decode mode. Paste your JWT token in the input field and the tool will instantly decode it, showing you the header, payload, and signature. It also analyzes claims like expiration time, issuer, and subject.

Question 4

Can I create JWT tokens with this tool?

Accepted Answer

Yes! Use the JWT tab and switch to Encode mode. Enter your header and payload JSON, and the tool will generate an unsigned JWT token for testing purposes. Note: For production, always sign tokens server-side with a secret key.

Question 5

How do I check if a JWT token is expired?

Accepted Answer

Paste your JWT in the JWT tab's Decode mode. The tool automatically checks the exp (expiration) claim and shows a status indicator: green for valid tokens, red for expired tokens, and yellow for tokens that aren't valid yet.

Question 6

Can I edit JSON values directly in the tree view?

Accepted Answer

Yes! The Visualize tab features an interactive tree editor. Double-click any value to edit it inline. You can also double-click keys to rename them, use the + button to add new items (choose from string, number, boolean, null, object, or array), and the × button to delete nodes. Changes are reflected in real-time.

Question 7

Can I sync or revert changes in the diff view?

Accepted Answer

Yes! When comparing two JSON/YAML files in the Diff tab, hover over any difference to see revert buttons. Click → to apply the left value to the right side, or ← to apply the right value to the left side. For objects/arrays, use L→R or R→L buttons. This makes it easy to synchronize changes between documents.

Question 8

Can I validate YAML syntax?

Accepted Answer

Yes! The Validate tab accepts both JSON and YAML. It automatically detects the format and provides detailed error messages with line numbers if the syntax is invalid.

Question 9

Is this JSON/YAML/JWT tool free?

Accepted Answer

Yes, JSON/YAML Toolkit is completely free to use. There are no ads, no registration required, and no usage limits. Your data stays in your browser and is never sent to any server.