voiddo urlencode vs urlencoder.org
Both encode and decode URLs online. This page compares encoding modes, privacy model, offline support, + handling, and when each tool fits your workflow.
voiddo urlencode — use when
- You need encodeURIComponent and encodeURI dual mode — switch between encoding query values vs. full URLs with one click
- You're encoding sensitive strings — API keys, tokens, passwords — that must never touch a server
- You need it to work offline — encodes in-browser with zero server calls after load
- You want + as space toggle for application/x-www-form-urlencoded form data
- You want a developer-focused dark UI with no ads, no signup, and copy-to-clipboard
urlencoder.org — use when
- You need a character-by-character breakdown table showing each byte and its encoded form
- You need batch / multi-line encoding of several strings at once
- You prefer an established high-traffic reference with a very long URL history
- Input is non-sensitive and a server-side round-trip is acceptable
feature comparison
| feature | voiddo urlencode | urlencoder.org |
|---|---|---|
| URL-encode strings | ✓ browser-side JS | ✓ server-side |
| URL-decode strings | ✓ | ✓ |
| encodeURIComponent mode | ✓ (query values & path segments) | single encoding model |
| encodeURI mode (full URL) | ✓ preserves : / ? # @ & = | not separately offered |
| + as space toggle | ✓ for form POST data | ✓ |
| character-by-character breakdown table | not shown | ✓ per-byte view |
| batch / multi-line encoding | single input area | ✓ multi-line support |
| copy-to-clipboard button | ✓ | ✓ |
| real-time encoding (as-you-type) | ✓ | button-triggered |
| text sent to server | never — browser-only | server-side processing |
| works offline | ✓ after initial load | requires connection |
| zero external dependencies | ✓ pure JS built-ins | not disclosed |
| ads | none | ads present |
| price | free | free (ads-supported) |
| account required | no | no |
frequently asked questions
Is voiddo urlencode an alternative to urlencoder.org?
Yes. voiddo urlencode is a free browser-only URL encoder and decoder. It supports both encodeURIComponent mode (for query parameter values and path segments) and encodeURI mode (for full URLs preserving structural characters), plus decode mode with optional + → space handling for form data. All processing runs in your browser — no text is ever sent to a server. It is a suitable urlencoder.org alternative for developers who want privacy, dual-mode encoding, and a dark developer UI with no ads.
What is the difference between encodeURIComponent and encodeURI?
encodeURIComponent encodes everything except unreserved characters (letters, digits, - _ . ! ~ * ' ( )). Use it for individual query parameter values or path segments — so special characters like &, =, /, and ? get encoded and cannot be misread by the server as URL structure. encodeURI leaves URI structural characters (: / ? # @ & =) untouched — use it when encoding a complete URL whose structure is already correct. voiddo urlencode lets you switch between these two modes with a single click, which is especially useful when working with mixed URL components in the same session.
Does voiddo urlencode send my text to a server?
No. All encoding and decoding runs in your browser using JavaScript's built-in encodeURIComponent and encodeURI functions — nothing leaves your device after the page loads. You can verify this by opening DevTools → Network tab while encoding: the only outbound requests are for fonts and shared CSS loaded at page-open, not per-keystroke. This makes voiddo urlencode suitable for encoding sensitive API keys, OAuth tokens, passwords, or private query strings without risk of interception or logging.
What does the + as space toggle do?
In HTML form submissions using
application/x-www-form-urlencoded, spaces are traditionally encoded as + rather than %20. When you enable the + option in voiddo urlencode, spaces in the input are emitted as + instead of %20. In decode mode, incoming + characters are treated as spaces before percent-decoding. Toggle this on when working with form POST bodies, legacy CGI parameters, or any URL parameter scheme that uses the + convention (common in older PHP and ASP.NET apps).What characters does encodeURIComponent NOT encode?
encodeURIComponent leaves these characters unencoded: A–Z a–z 0–9 - _ . ! ~ * ' ( ). All other characters — including spaces, @, &, =, +, /, ?, #, :, and non-ASCII Unicode — are percent-encoded to their UTF-8 byte sequences. For example: a space becomes %20, & becomes %26, / becomes %2F, and the accented character é becomes %C3%A9 (its two-byte UTF-8 representation). This is the correct encoding for individual query parameter names and values in a URL.
Is voiddo urlencode free?
Yes — completely free with no ads, no signup, no rate limits, and no paywalls. It is part of the 50+ free developer tools at tools.voiddo.com.
Try voiddo urlencode — encodeURIComponent/encodeURI dual mode, browser-only, no ads:
open urlencode →Feature descriptions based on publicly observable behaviour as of May 2026. Features may change; verify on each tool's own page before making a production decision.