URL Encoder & Decoder
Escape an individual query value or inspect a whole URI using the appropriate boundary.
Maximum 500,000 characters. Use synthetic examples instead of secrets.
Local processing · No account · Input is not uploaded by this tool
How to use this tool
- Choose the relevant options. Set the operation, format or algorithm before running. The options above define how the result is interpreted.
- Enter data or load an example. Query value R&D tools becomes R%26D%20tools in component mode.
- Run and inspect the feedback. Use the primary action, then read the status message. An error clears old output so it cannot be mistaken for a fresh result.
- Copy, download or start again. Copy and Download become available when a current nonempty result exists. Reset clears the text result; no input is stored by this site.
How it works
Component mode uses encodeURIComponent/decodeURIComponent; whole-URI mode uses encodeURI/decodeURI. An explicit decoding option applies form-style plus-as-space handling.
The computation is performed by this page’s JavaScript after you choose Run. Input and results are kept in the current tab’s memory. There is no background submission, analytics event containing your input, or server-side conversion in this build.
Practical example
Use Load example to try the supported format, then change one value and run again. Comparing those two results is a quick way to understand what the operation changes and what it preserves. The linked guides below provide worked examples for the edge cases relevant to this utility.
Common mistakes
Encoding a value twice produces extra %25 sequences. Whole-URI mode preserves separators and is unsuitable for arbitrary raw query values.
Limits and unsupported tasks
This does not validate navigation safety or parse an entire query into fields. Encoding is not HTML sanitization. Malformed percent escapes and invalid UTF-8 are rejected. Maximum input: 500,000 characters.
Privacy and handling sensitive data
A URL can expose tokens in its query even after encoding. Use example.test and synthetic parameter values for reports. The converter does not navigate to the entered URL, look up its host or contact its destination. Copy and Download use your device. Browser extensions and hosting logs have separate boundaries, explained in the privacy policy.
Usage guides
Questions, answered
Does the URL Encoder & Decoder upload my input?
No. The implementation processes it in your browser and does not submit it to a server. Ordinary page requests still reach the hosting service.
Why did Copy or Download become unavailable?
The input changed or validation failed, so the previous output was cleared. Run the tool again to create a current result.
Can I use this for every production workflow?
This does not validate navigation safety or parse an entire query into fields. Encoding is not HTML sanitization. Malformed percent escapes and invalid UTF-8 are rejected. Maximum input: 500,000 characters.