URL Encoder & Decoder
Percent-encode or decode URLs and query parameters safely.
Encoded
https%3A%2F%2Fveojson.com%2Ftools%3Fq%3Dhello%20world%26lang%3Dfr
Decoded
https://veojson.com/tools?q=hello world&lang=fr
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About this tool
Percent encoding replaces unsafe characters with a % followed by two hex digits so they survive transport in a URL. This tool runs encodeURIComponent and decodeURIComponent (plus full-URI variants) locally in your browser.
Component vs full URI
Use component mode for a single query value — it escapes &, =, ? and /. Use full URI mode when encoding a complete address you do not want to break.
Spaces and plus signs
Percent encoding turns a space into %20. Some form encoders use + instead; decode with the matching mode or you will get literal plus characters back.
How to use URL Encoder & Decoder
- 1
Open URL Encoder & Decoder
Everything runs on this page — there is nothing to install and no account required to use the free features.
- 2
Add your input
Paste or enter your values in the panel above. The tool updates as you type, so you can iterate quickly.
- 3
Review the output
Check the result, copy it with one click, and adjust the options until it matches what your system expects.
- 4
Take it further
Use the developer & api tips below to make the result production-ready, then unlock the gated extras via the form above.
Best practices
- Work from a real payload, not a hand-typed sample — encoding bugs hide in whitespace and Unicode.
- Keep the transformation reproducible: script it in CI once you have confirmed the output here.
- Never paste live credentials, customer records or production tokens into any web tool you have not audited.
- Version the inputs and outputs you rely on so a teammate can reproduce the same result later.
Why URL Encoder & Decoder matters
Small integration details — an encoding, a claim, a header — are where most API bugs actually live, and they are expensive to find in production logs.
Getting them right in seconds keeps debugging sessions short and prevents malformed data from reaching downstream systems.
Related free & paid tools
| Tool name | Type | Key features | Link |
|---|---|---|---|
| MDN encodeURIComponent | Free | The exact semantics your browser applies | Visit |
| CyberChef | Free | URL, HTML and double-encoding recipes | Visit |
| PostmanOffer | Freemium | Automatically encodes query params and paths | Visit |
Links marked Offer may be partner links. They cost you nothing extra and never affect which tools we recommend.