When should I use + instead of %20 for spaces?

+ is standard in application/x-www-form-urlencoded query strings, while %20 is standard in RFC 3986 URI paths.

URL Encoder & Decoder

100% Client-Side • Zero Upload

Encode, decode, and visually edit URL components, query parameters, and percent-encoded strings.

100% In-Browser Secure Encoding Studio

Encode space as +

Input to Encode

Encoded Result

https%3A%2F%2Fsafewebutil.com%2Fsearch%3Fq%3Db%E1%BA%A3o%20m%E1%BA%ADt%20%26%20ti%E1%BB%87n%20%C3%ADch%3D100%25

How to Use URL Encoder & Decoder

Input URL or String

Paste a full URL or any string with special characters.

Choose Mode

Encode or decode entire URLs or components, and choose whether spaces encode as %20 or +.

Edit Query Parameters

Switch to the Query Inspector to view, toggle, edit, or add URL query key-value pairs.

Key Benefits

Interactive Query Parameter table to inspect and modify query strings on the fly
Configurable space encoding (%20 vs +)
Handles malformed URI strings gracefully
Instant live bidirectional conversion

Browser & Hardware Notes

Extremely long URLs (>8,000 characters) may be truncated by some browser address bars when copied.

Frequently Asked Questions about URL Encoder & Decoder

encodeURI preserves standard URL delimiters like ://, ?, &, and #, whereas encodeURIComponent encodes all characters not in the unreserved set.

100% In-Browser Privacy Architecture

How URL Encoder & Decoder Operates Privately on Your Device

Unlike traditional cloud services that transmit your confidential files across the open internet to remote servers, SafeWebUtil operates on a strict zero-upload client-side architecture. Every transformation performed by URL Encoder & Decoder executes exclusively within your browser's secure memory sandbox.

Native Web Crypto API (SubtleCrypto)

All cryptographic hashing, signing, and encryption routines strictly execute through browser-native Constant-Time primitives, immune to timing side-channel attacks.

Authenticated Military-Grade Ciphers

Utilizes AES-256-GCM authenticated encryption and PBKDF2 with high iteration counts to ensure data confidentiality and cryptographic tamper resistance.

Zero Ingestion & Ephemeral Memory

Plaintext passwords, JWT tokens, and symmetric keys reside exclusively in temporary JavaScript memory and are zeroized as soon as the tab is closed.

Engineering Insights & Performance Best Practices for URL Encoder & Decoder

Cryptographic algorithms execute via constant-time Web Crypto primitives. Confidential JWT tokens, private passwords, and symmetric encryption keys never leave your machine.

Read our technical research on why client-side processing is the future of digital privacy