Why percent-encode a URL?

Certain characters such as spaces and '&' have special meaning in URLs. Percent-encoding makes them safe to transmit without breaking the URL structure.

What is the difference between component and full URL modes?

Component mode encodes every reserved character (like encodeURIComponent), while full URL mode preserves URL structure such as '://', '?', '#', and '&', encoding only spaces and truly unsafe characters.

How are spaces encoded?

Spaces are encoded as %20 (not '+'). The + encoding is specific to application/x-www-form-urlencoded in HTML forms; %20 is the correct general-purpose encoding for URL paths and query parameters.

Which characters are left unencoded?

Unreserved characters A-Z, a-z, 0-9, '-', '.', '_', and '~' are never encoded. In full URL mode, reserved characters like ':', '/', '?', '&', '=' are also preserved.

How are multibyte characters handled?

Characters are encoded to bytes using the selected charset (UTF-8 by default), then each byte is percent-encoded. '你好' becomes %E4%BD%A0%E5%A5%BD in UTF-8.

Is my data uploaded anywhere?

No. All encoding happens locally in your browser with no server round-trip.

Encodeur d'URL

Percent-encode text for safe use in URLs. Gratuit, privé et 100% côté client.

ModeJeu de caractères

Entrée

Essayer un exemple:

Sortie

Local only

Historique récent

Aucun historique

Utilisation

Paste the text or URL into the input box.
Choose component or full URL mode.
Copy the percent-encoded result.

Tâches utilisant cet outil

Construire URL query strings from objects

Construct properly encoded requête chaînes de JavaScript objets. Handle tableaux, nested objets, et special caractères correctly.

TÂCHE

Coder binary data into a JSON-safe string

Convertir raw bytes (images, encrypted blobs, file contents) into a Base64 string that can be embedded inside a JSON field without breaking the structure.

TÂCHE

Coder text for safe use inside a URL query string

Turn arbitrary texte (avec spaces, ampersands, Unicode, equals signs) en un valeur ce peut être placed directly après ?key= en un URL sans breaking parsing.

TÂCHE

Analyser a URL into components and construct URLs from parts

Decompose un URL en protocol, host, path, requête, fragment — et construire un URL de individual composants safely.

TÂCHE

Analyser URL query strings

Requête chaînes passer clé-valeur pairs en URLs après le ?. Apprendre parsing, codage, et handling de tableaux, nested objets, et special caractères.

TÂCHE

Utiliser MQTT topic structure pour IoT messaging

MQTT topics utiliser slash-separated hierarchies avec wildcards pour subscription. Apprendre topic design, QoS levels, et retained messages.

TÂCHE

Pipelines utilisant cet outil

Coder une charge utile JSON pour transport URL

PIPELINE

Kebab Case et encodage URL

PIPELINE

Coder URL puis double Base64

PIPELINE

Coder une charge utile texte pour transport URL

PIPELINE

Questions fréquentes

Why percent-encode a URL?: Certain characters such as spaces and '&' have special meaning in URLs. Percent-encoding makes them safe to transmit without breaking the URL structure.
What is the difference between component and full URL modes?: Component mode encodes every reserved character (like encodeURIComponent), while full URL mode preserves URL structure such as '://', '?', '#', and '&', encoding only spaces and truly unsafe characters.
How are spaces encoded?: Spaces are encoded as %20 (not '+'). The + encoding is specific to application/x-www-form-urlencoded in HTML forms; %20 is the correct general-purpose encoding for URL paths and query parameters.
Which characters are left unencoded?: Unreserved characters A-Z, a-z, 0-9, '-', '.', '_', and '~' are never encoded. In full URL mode, reserved characters like ':', '/', '?', '&', '=' are also preserved.
How are multibyte characters handled?: Characters are encoded to bytes using the selected charset (UTF-8 by default), then each byte is percent-encoded. '你好' becomes %E4%BD%A0%E5%A5%BD in UTF-8.
Mes données sont-elles téléversées quelque part ?: Non. Tout l'encodage s'effectue localement dans votre navigateur, sans aller-retour serveur.