URL Encoder Decoder - Encode & Decode URL Query Strings Online
Encode/decode URL parameters and construct fully tracked UTM campaign links. This master tool ensures links conform to RFC standards, sanitizes web query strings, and manages marketing coordinates safely.
✓ 100% Free & Unlimited
✓ 100% Browser Local & Private
✓ No Registration Required
How to use URL Encoder & Decoder Online
- Step 1: Paste your raw string or base destination link into the input field.
- Step 2: Select URL encoding/decoding, or fill in UTM attributes (Campaign Source, Medium, Name).
- Step 3: Review your structured web link or decoded string, and copy it.
Frequently Asked Questions
Why is URL encoding necessary for query strings?
URLs can only contain characters from the standard US-ASCII set. Special characters, spaces, and non-ASCII glyphs are converted to hexadecimal '%XX' representations to prevent broken queries and security issues.
What do UTM tracking tags represent in marketing campaigns?
UTM (Urchin Tracking Module) tags are parameters added to URLs to track campaign traffic in analytics. They identify the source (e.g., Google), medium (e.g., newsletter), and campaign name.
Is this URL builder safe for encoding private data?
Yes. Because no data is processed on external servers, your sensitive API queries, key strings, and private directories remain 100% confidential.