URL-encode JSON
URL-encode JSON instantly so it is safe for query strings and API requests. Free online JSON URL encoder tool with valid
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How to Use URL-encode JSON
- Paste your JSON: Paste valid JSON into the input box, or load the sample.
- Click URL-encode: Press the URL-encode JSON button. The JSON is validated and percent-encoded for URLs.
- Copy the encoded string: Copy the encoded string and pass it as a query parameter like ?data=...
About URL-encode JSON
URL-encode JSON percent-encodes JSON so it can be passed safely in URLs and query strings.
- Validation: Input must be valid JSON before encoding.
- Query Safe: All unsafe characters are percent-encoded for use in ?param= values.
- One-Click Copy: Copy the encoded string directly into your URL.
Ideal for passing structured data between pages, embedding filters and building API links.
Frequently Asked Questions
Why URL-encode JSON?
URLs only allow safe characters. Encoding JSON lets you pass structured data as query parameters like ?data=%7B%22name%22... without breaking the URL.
Does it validate my JSON first?
Yes — the tool validates that your input is valid JSON before encoding, so you never encode broken data.
Can I decode it later?
Yes. Use the URL-decode JSON tool on this site to decode the parameter back into formatted JSON.