Developer

URL Encoder Guide — Percent-Encoding Query Strings

Encode and decode URL parameters safely for OAuth redirects, analytics tags, and API links.

Published June 1, 2025 · 1 min read

Written by Ethan Brooks · Editor-in-Chief & Product Lead

Reviewed by James Cole

Last reviewed January 15, 2026 · Editorial policy

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URL encode and decode query strings

Spaces, ampersands, and Unicode in query parameters must be percent-encoded. The URL encoder and URL decoder handle %20, +, and UTF-8 safely when building OAuth redirects or analytics tags.

Example

hello world → hello%20world. Always encode user-supplied values before concatenating URLs.

Sources & references

Primary references used when researching and fact-checking this guide. See our editorial methodology.

Adobe PDF Reference — encryption — Adobe
PDF password protection and encryption standards (ISO 32000).
Ghostscript documentation — PDF settings — Artifex Software
Compression level behavior and PDF output settings.