URL Encoder / Decoder
Percent-encode and decode URLs and query-string components. Supports encodeURIComponent and encodeURI modes. Handles Unicode, special characters and malformed sequences.
Data handling: Processing: this tool runs in your browser and does not send entered data to a tool-service endpoint. Site analytics, advertising, or embedded resources may still make separate requests. See the Privacy Policy for site-level details.
About URL Encoder / Decoder
Use URL Encoder / Decoder whenever you need reliable, immediate execution: Percent-encode and decode URLs and query-string components. Supports encodeURIComponent and encodeURI modes. Handles Unicode, special characters and malformed sequences. Using it is a three-step job: 1) Choose Encode or Decode, 2) Paste your text, URL or query parameter, 3) Copy the result and drop it into your URL, API call or code. Processing depends on the specific operation. Any external lookup or service should be identified near the tool controls.
URL Encoder / Decoder is a free, browser-based url encoder decoder from ProfitTool. Percent-encode and decode URLs and query-string components. Supports encodeURIComponent and encodeURI modes. Handles Unicode, special characters and malformed sequences. Review any usage notes shown on this page before relying on its availability. Review the tool's data-handling notice before entering sensitive information; some features store settings locally or contact external services.
People who use Base64 Encoder / Decoder usually reach for this next: URL Inspector & Parser covers the other half of the workflow.
Technical Limitations & Boundary Conditions
- Results reflect the inputs and assumptions shown. Fees, taxes, rates, and personal circumstances can change the real-world outcome; verify important figures with the relevant provider or authority.
- Extreme values outside standard ranges may be constrained by device memory or numerical precision boundaries.
Key Terms Explained
- Base64
- An encoding that represents binary data in ASCII. It is not encryption — anyone can decode it.
- JWT
- JSON Web Token: three base64url segments (header, payload, signature) separated by dots.
- Epoch time
- Seconds elapsed since 1 January 1970 UTC — the format most APIs use for timestamps.
- UUID v4
- A 122-bit random identifier with a collision probability low enough to ignore in practice.
Pro Tips & Best Practices
- Check the individual tool's data-handling notice before entering staging secrets or personal data.
- Use ⌘/Ctrl-A to select-all inside the editor before copying results.
- Pair it with your terminal — copy the output straight into a curl or fetch call.
Popular Use Cases
- Case 1Format, validate and diff JSON, XML, YAML and SQL payloads.
- Case 2Debug JWTs, base64 blobs, timestamps and regex patterns quickly.
- Case 3Generate secure UUIDs, tokens, hashes and passwords for staging setups.
- Case 4Prep sample data and mock responses before your backend is ready.
Common Mistakes to Avoid
Pasting production secrets into remote tools
Anything that leaves your machine should be assumed logged. Prefer tools that run locally — verify with the Network tab.
Trusting a decoded JWT payload
Decoding is not verifying. Always validate the signature server-side before acting on claims.
Treating base64 as security
It obscures nothing. Encrypt if the data is sensitive.
If you came here from the URL Inspector & Parser, keep JWT Decoder open in a second tab.
How to use URL Encoder / Decoder
- 1Choose Encode or Decode.
- 2Paste your text, URL or query parameter.
- 3Copy the result and drop it into your URL, API call or code.
Pairs naturally with the JWT Decoder — Base64 Encoder / Decoder is the usual next step.
Frequently Asked Questions
Does it encode reserved characters?›
Yes — this uses encodeURIComponent, which encodes every reserved character. Ideal for query parameters.
What's the difference from URL encoding vs. HTML encoding?›
URL encoding uses %XX percent escapes for use in URLs; HTML encoding uses named entities like & for use in markup.
Is it safe to paste secrets or production payloads into URL Encoder / Decoder?›
Do not paste live credentials into a website unless you have verified the tool's implementation and data-handling notice. Rotate any credential you have already exposed.
Are there related developer tools tools I should use alongside it?›
Yes — the related-tools panel on this page links the utilities most people open right before or after URL Encoder / Decoder, so you can chain them into one workflow.
Which standards does URL Encoder / Decoder follow?›
It relies on native Web APIs — TextEncoder, SubtleCrypto, JSON and the URL parser — so output matches what your runtime will produce in Node, Deno or the browser.
Is URL Encoder / Decoder free to use?›
Yes — URL Encoder / Decoder is completely free with no signup, watermark, trial or hidden paywall, however often you use it.
What happens if my input is malformed?›
You get a specific parse error with the offending position instead of a silent failure, which is usually enough to spot the missing comma or bracket.
Does URL Encoder / Decoder work on mobile phones and tablets?›
Yes. The layout is mobile-first and tested on iOS Safari, Android Chrome and every current desktop browser, with tap targets sized for thumbs.
Can I automate this url encoder decoder in CI?›
This page is interactive, but everything it does maps to a one-line script using the same Web APIs, so porting the logic into a CI step is straightforward.
Guides that explain URL Encoder / Decoder
Background reading from the ProfitTool Knowledge Hub.