Built carefully, kept simple.

What this site is

urlencodedecode.com is a free, browser-based encoder and decoder for percent-encoded URLs. It does one thing: convert between URL-encoded format and human-readable text. It does that one thing carefully — with support for 30+ character sets, RFC 3986-strict and form-encoded variants, line-by-line batch processing, and live-update mode.

Why it exists

If you’ve worked with APIs, query strings, web forms, or any system that exchanges data through URLs, you’ve hit URL encoding. The format is everywhere, but the tools tend to fall into two camps:

• One-input-one-output decoders that crash or guess wrong on anything mildly unusual — non-UTF-8 source text, double-encoded inputs, form-encoded variants.
• Heavy developer suites with twenty features bolted on, half of them broken on mobile, all of them sending your data to someone’s server.

We wanted a URL tool that lives in the middle: smart enough to handle real-world inputs, focused enough to load instantly, and trustworthy enough to use for tokens you’d rather not have logged on a third-party server.

How it’s built

• Client-side decoder. The decoder and encoder run as pure HTML, CSS, and JavaScript in your browser. No frameworks, no build step. Your inputs are processed locally and never sent to our servers.
• Tiny payload. The entire site is under 250 KB. Loads in under a second on a modern connection.
• Browser-native primitives. The encoder uses encodeURIComponent and TextEncoder; the decoder uses decodeURIComponent and TextDecoder. Both are built into every modern browser. No third-party libraries handle your data.
• Standards-compliant. The implementation follows RFC 3986 (URI generic syntax) and the WHATWG URL Living Standard for browser-native compatibility.

How we keep the site free

The site is supported by advertising. We use Google Analytics 4 to understand which pages and tools people find useful, Google AdSense for contextual ads, and an Adsterra banner for the ad at the top of every page. These services set cookies and collect standard ad-serving telemetry — but they have no access to what you type into the encoder or decoder. The advertising scripts and the encoder scripts are independent of each other.

If you’d rather not see ads or analytics, a tracker-blocker like uBlock Origin disables all of them and the site continues to work fully. Full disclosure, opt-out instructions, and the cookies set are all in the privacy policy.

What we don’t do

• We don’t sell your personal data.
• We don’t share the contents of your encoder/decoder inputs with advertisers, analytics, or anyone else — they never leave your browser.
• We don’t run a paywall, freemium tier, or “premium” upsell. The free tool is the entire product.
• We don’t profile users across the web — the analytics we use sees aggregate page views, not identities.

Get in touch

Spot a bug, want a feature, or have a URL-encoding question that isn’t in the FAQ? Email contactus@urlencodedecode.com or use the contact form. Responses usually within a day or two.

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Last updated May 2026. Questions? Email contactus@urlencodedecode.com.