URL Encoder / Decoder

• 100% Free

  Core tools stay free with no paywall to unlock basics.

• No Registration Required

  Open a tool and start immediately - no account needed.

• Privacy First

  We avoid unnecessary collection and keep processing local when possible.

• Browser Processing

  Most tools run in your browser so your input never needs a server round-trip.

• Fast & Secure

  HTTPS everywhere with instant, client-side results for everyday tasks.

• Mobile Friendly

  Layouts and controls are built for phones, tablets, and desktops.

• Updated Regularly

  Tools and content are improved continuously as the platform grows.

Key Features

• Component-accurate encoding

  Uses JavaScript's encodeURIComponent/decodeURIComponent so query parameters, form values, and path segments come out exactly as browsers and servers expect.

• Form-encoding aware decoding

  Plus signs are automatically treated as spaces during decode, matching the application/x-www-form-urlencoded convention used by HTML forms.

• Friendly error handling

  Malformed percent-encoded sequences produce a clear, readable error message instead of a cryptic thrown exception.

• Fully local processing

  Every conversion runs in your browser's JavaScript engine, with no network request sent for the text you type.

How to Use

1. 1

   Pick encode or decode

   Choose the direction based on whether you have raw text to protect, or a percent-encoded string to read.

2. 2

   Paste your value

   Enter the raw text, query value, or already-encoded string you want to convert.

3. 3

   Review the result and length

   Check the converted output along with input and output character counts to confirm nothing was truncated or misinterpreted.

4. 4

   Copy the result into your code

   Copy the encoded or decoded value directly into your URL, HTTP client, curl command, or source code.

Use Cases

• Building query strings by hand

  Safely encode search terms, filter values, or redirect URLs before appending them to a link.

• Debugging broken redirects

  Decode a suspicious-looking URL from logs or browser history to see the real parameter values behind the percent signs.

• Inspecting webhook and API payloads

  Quickly decode form-encoded or query-string parameters captured from API requests during debugging.

• Preparing values for command-line tools

  Encode arguments before pasting them into curl commands or shell scripts that expect URL-safe text.

Examples

blue shoes

blue%20shoes

a&b=c

a%26b%3Dc

hello+world%21

hello world!

Benefits

• ✓Produces exactly the encoding real browsers use for query parameters
• ✓Surfaces clear errors instead of a blank screen when decoding fails
• ✓Handles the plus-for-space form-encoding convention automatically
• ✓Saves a trip to the browser console or a curl -G test just to encode a value
• ✓Keeps potentially sensitive parameter values off any server, including ToolMint's

Best Practices

• Encode individual parameter values, not an entire URL including its scheme and host - that breaks the URL structure.
• Decode step by step when a value looks double-encoded (%2520 instead of %20) rather than assuming a single pass will fix it.
• Remember encodeURIComponent escapes more characters than encodeURI - use this tool's component-level output for query values, not full paths.
• Verify decoded output before trusting it in security-sensitive contexts; encoding is not validation or sanitization.

Common Mistakes

• Encoding a complete URL, which turns the scheme separators (://) and slashes into percent-encoded junk instead of a working link.
• Assuming percent-encoding is the same as HTML entity escaping - they solve different problems and are not interchangeable.
• Treating encoded text as secure or hidden, when it is simply a reversible, publicly documented transformation.

Privacy Notice

All encoding and decoding runs locally in your browser's JavaScript engine. ToolMint never receives, logs, or stores the values you type, which makes it safe to use even for parameters that contain internal identifiers.

About This Tool

Frequently Asked Questions

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