URL Decode JSON
Decode URL-encoded JSON back to regular JSON.
Input (URL-encoded JSON)
Output (JSON)
What It Does
The URL Decode JSON tool reverses percent-encoding to restore JSON data from URL-encoded format back to its original readable structure. Use this when extracting JSON from URLs, query strings, or when debugging encoded API parameters.
Common Use Cases
- Extracting JSON data from URL query parameters
- Debugging encoded JSON in browser address bars
- Restoring JSON from bookmarked or shared URLs
- Reading JSON embedded in webhook URLs
- Converting URL-encoded API responses to readable JSON
How to Use
- Paste the URL-encoded JSON string into the input area
- The tool automatically decodes all percent-encoded characters
- View the restored, readable JSON output
- Copy the decoded JSON for further processing
Features
- Complete reversal of percent-encoding
- Handles deeply nested encoded structures
- Validates JSON structure after decoding
- Preserves all data types and formatting
Examples
Below is a representative input and output so you can see the transformation clearly.
hello%20world%3F
hello world?
Edge Cases
- Very large inputs may take a few seconds to process in the browser. If performance slows, split the input into smaller batches.
- Mixed formatting (tabs, line breaks, or inconsistent delimiters) can affect output. Normalize spacing first if needed.
- URL Decode JSON follows the selected options strictly. If the output looks unexpected, re-check option settings and input format.
Troubleshooting
- Output looks unchanged: confirm the input contains the pattern this tool modifies and that the correct options are selected.
- Unexpected characters: check for hidden whitespace or encoding issues in the input and try normalizing first.
- Slow processing: reduce input size or try a modern browser with more available memory.
Tips
If the decoded output isn't valid JSON, check that the original data was proper JSON before encoding.
Frequently Asked Questions
Is my input stored or logged?
No. This tool is designed to run in your browser, and we do not store or log your content during processing.
Is conversion instant?
Yes for most inputs. Output updates immediately, and large inputs may take a moment depending on your device.
Can this handle large text?
It can handle large text, but performance depends on your browser and device. For very large files, consider splitting the input.
Does it support mobile?
Yes. The interface is responsive and works on phones and tablets, so you can use it on the go.
Can I use it for commercial projects?
Yes. You are free to use the output in personal or commercial projects without attribution.
Does this affect numbers or punctuation?
Only if the selected options target them. Otherwise, numbers and punctuation are preserved as-is.