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URL Encoder

Percent-encode text for URLs, with component and full-URI modes.

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The URL Encoder converts text into a percent-encoded form that is safe to place inside a web address. Characters such as spaces, ampersands, question marks and non-ASCII letters either carry special meaning or are not allowed in URLs, so they must be escaped using percent codes like %20 for a space and %3D for an equals sign to avoid breaking links.

This tool is built for developers, marketers and anyone who assembles URLs by hand and needs them to behave correctly. It offers two modes that mirror the standard JavaScript functions, so the output matches exactly what your code would produce. That predictability makes it ideal for crafting query strings, API request URLs and tracking parameters with confidence.

Component mode uses encodeURIComponent and escapes every reserved character, which is correct for individual query-string values, while Full URI mode uses encodeURI and preserves the structural characters that make a valid address, such as slashes and the question mark. Everything runs locally in your browser, so the text you encode is never uploaded.

Features of URL Encoder

  • Two distinct modes cover both single query values and whole addresses using encodeURIComponent and encodeURI.
  • Live encoding updates the percent-encoded result instantly as you type or change the selected mode.
  • Reserved characters such as spaces, ampersands, question marks and equals signs are escaped correctly.
  • Non-ASCII characters are percent-encoded as their UTF-8 byte sequences, matching the modern URL standard.
  • Component mode escapes every reserved character, which is exactly right for individual query-string values.
  • Full URI mode preserves the slashes, colons and question marks that make up a valid URL structure.
  • One-click copy and text download let you drop the encoded value straight into code or a browser bar.
  • All encoding runs entirely in your browser, so the text and URLs you enter are never uploaded anywhere.

How to use URL Encoder

  1. Type or paste the text or URL you want to encode into the input box at the top of the tool.
  2. Optionally load a plain text file in the accepted .txt format if you have a longer value to encode.
  3. Choose Component mode to encode a single query value, or Full URI mode to encode a complete address.
  4. Watch the percent-encoded result appear instantly in the output area as you type or switch modes.
  5. Compare the two modes if you are unsure which characters need escaping for your particular situation.
  6. Copy the encoded result into your link, code or API request, or download it as a text file.

Benefits of URL Encoder

  • Developers can build safe query strings and API request URLs whose special characters will not break parsing.
  • Marketers can encode UTM parameters and campaign tracking values so analytics records them accurately.
  • Support teams can craft shareable links that contain spaces, symbols or non-English characters reliably.
  • QA engineers can reproduce exactly how application code encodes a value when investigating a bug.
  • Students can learn how percent-encoding works and see the difference between the two standard functions.
  • Anyone can escape text for URLs without memorising hex codes or guessing which characters need escaping.

Reach for Component mode when you are encoding the value that sits after an equals sign in a query string, because it escapes ampersand, equals and question mark characters that would otherwise split your URL into the wrong pieces. This is the right choice for search terms, identifiers, redirect targets and any single parameter you are inserting into a larger address by hand.

Use Full URI mode when you already have a complete address and only want to repair the parts that are unsafe, such as spaces and accented letters, while leaving the slashes, colon and question mark that define the URL structure intact. Picking the wrong mode is the most common cause of links that look encoded but still fail, so match the mode to the task.

Because the encoder mirrors the browser's own encodeURIComponent and encodeURI functions, its output is exactly what your JavaScript would generate, which makes it perfect for debugging. All processing happens locally in your browser, so URLs containing private identifiers or tokens are never uploaded, logged or stored, and you can encode sensitive parameters without any privacy concerns.

Questions about URL Encoder

What is the difference between the two modes?
Component mode uses encodeURIComponent and escapes every reserved character, so it suits single values. Full URI mode uses encodeURI and deliberately leaves URL-structure characters such as slash, colon, question mark and ampersand intact so a complete address stays valid.
Which mode should I use for a query parameter value?
Use Component mode. It escapes ampersand, equals and question mark characters inside the value so they cannot be mistaken for separators in the surrounding URL. Full URI mode would leave those characters unescaped and could break your query string.
Does it handle non-English characters?
Yes. Non-ASCII characters such as accented letters, emoji and non-Latin scripts are percent-encoded as their UTF-8 byte sequences, which is the standard expected by modern web servers and is exactly how browsers encode the same characters.
Is the encoding done privately?
Yes. All encoding runs in your browser using JavaScript, so the text and URLs you enter, including any private identifiers or tokens, are never sent to a server, logged or stored. The tool works entirely on your own device.
Why does Component mode escape the slash character?
Component mode treats the entire input as a single value rather than a structured address, so it escapes the slash to %2F to keep it from being interpreted as a path separator. That is exactly what you want when a value happens to contain slashes.
How do I reverse this encoding?
Use our companion URL Decoder, which reverses percent-encoding and also converts plus signs back to spaces. Paste the encoded URL or query string there to recover the original human-readable text, including any non-ASCII characters that were encoded as UTF-8.
How your data is handled: This tool runs entirely in your browser. Nothing is uploaded or stored on our servers.

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Guides and related topics for URL Encoder

Glossary

What is URL Encoding (Percent-Encoding)?

URL encoding replaces characters that are unsafe in a URL with a percent sign followed by their hexadecimal byte value, so links stay valid.

Comparison

Base64 vs URL Encoding

Base64 vs URL encoding: binary-to-text versus safe URL characters. Learn what each does, why they're not interchangeable, and when to use them.

Comparison

URL Encoding vs HTML Entities

URL encoding vs HTML entities: safe URLs versus safe HTML. Learn why these two escaping schemes aren't interchangeable and when to use each.