URL Encoder / Decoder
Encode and decode URL components safely.
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Introduction
URL Encoder / Decoder — Encode and decode URL components safely. Enter Mode, Text to get an instant, accurate result.
Formula
Percent-encodes (or decodes) characters that aren't valid in a URL, replacing them with %XX hex escape sequences.
Step-by-step
- Enter the Mode.
- Enter the Text.
- Click Calculate to see your result instantly.
Real-world example
Example: With Mode = encode, the URL Encoder / Decoder gives Encoded: https%3A%2F%2Fcalchub.example%2Fa%20b.
Frequently Asked Questions
Why do spaces become %20?
Spaces aren't valid in a raw URL, so they're percent-encoded to their hex ASCII value (20 in hex).
When would I need to decode a URL?
When reading query parameters or paths that contain percent-encoded characters, to see their original readable form.
What inputs does the URL Encoder / Decoder need?
You'll need to provide: Mode, Text. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the URL Encoder / Decoder?
The URL Encoder / Decoder applies the formula exactly as calculated — Percent-encodes (or decodes) characters that aren't valid in a URL, replacing them with %XX hex escape sequences. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the URL Encoder / Decoder free to use?
Yes, the URL Encoder / Decoder is completely free, requires no signup, and runs instantly in your browser.
About the URL Encoder / Decoder
The URL Encoder / Decoder uses a real, verifiable formula — Percent-encodes (or decodes) characters that aren't valid in a URL, replacing them with %XX hex escape sequences. — so results are accurate every time, not an approximation.