URL Encoder/Decoder
Convert characters into a format that can be transmitted over the Internet. Use this free online tool directly in your browser.
URL encoding (also known as percent encoding) converts characters into a format that can be transmitted over the Internet. Special characters are replaced with a percent sign (%) followed by their hexadecimal representation.
Common Characters: Space → %20, & → %26, = → %3D, ? → %3F, # → %23
Use Cases: URL parameters, form data submission, API requests, storing URLs in databases.
What is URL Encoder/Decoder?
URL encoding (also called percent-encoding) converts characters that are not allowed in URLs into a safe format by replacing them with a percent sign followed by their hexadecimal ASCII code. For example, a space becomes %20 and an ampersand becomes %26. This is essential when passing user input as query parameters, building API request URLs, handling OAuth redirect URIs, and constructing query strings in JavaScript. This tool encodes and decodes both standard URL encoding and application/x-www-form-urlencoded format. Use it to debug malformed URLs, verify that special characters are correctly escaped, or quickly encode values for inclusion in curl commands and API test tools.
How to use
- 1
Paste or enter your data in the URL Encoder/Decoder input area.
- 2
Run the conversion, generation, or validation action.
- 3
Copy or download the result for your project workflow.
Common Use Cases
- 1
Encode query parameter values containing special characters for inclusion in API request URLs
- 2
Decode percent-encoded strings in logs or error messages to make them human-readable
- 3
Build OAuth 2.0 redirect URIs with properly encoded callback URLs
- 4
Debug malformed URL errors by identifying which characters are breaking your query string
- 5
Encode curl request payloads where spaces, ampersands, and equals signs must be escaped
Try an Example
Example Input
name=Mikey & city=San Francisco
Expected Output
name%3DMikey%20%26%20city%3DSan%20Francisco
Frequently Asked Questions
What is URL Encoder/Decoder?
URL Encoder/Decoder is a free browser-based utility on Bite Size Tools. Convert characters into a format that can be transmitted over the Internet.
Is URL Encoder/Decoder safe to use with sensitive data?
Yes. Tool processing runs in your browser, so your input is not sent to a server by default in this app.
Can I use URL Encoder/Decoder for production work?
Yes. You can use the output directly in development and production workflows after validating it with your project requirements.