Technology
Base64 encode and decode
Encode plain text as Base64 or decode valid Base64 text.
Calculators / Technology / URL encode and decode
URL encode and decode calculator
Percent-encode text for use in a URL component or decode it.
On this page
Encoded componenthello%20world
Calculator controls
How to calculate
Percent-encode text for use in a URL component or decode it.
Percent encoding replaces reserved or non-ASCII bytes with %HH sequences.
Worked example
Action: encode; Text: hello world.
Encoded component: hello%20world .
Assumptions and limits
This encodes one URL component, not a complete URL. Invalid escape sequences are rejected when decoding.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Percent-encode text for use in a URL component or decode it. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the url encode and decode to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Action | Enter one of the available options. |
| Text | Enter the value in the format shown. |
Frequently asked questions
What should I check before using the url encode and decode result?
This encodes one URL component, not a complete URL. Invalid escape sequences are rejected when decoding.
Is this url encode and decode result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.