← Tous les outils / Développeur

Base64 Convertisseur

Encoder et décoder Base64 en ligne gratuitement. Convertissez texte et fichiers en Base64 et inversement. Génération d'URI de données, encodage sécurisé pour URL.

Base64 Convertisseur is a free online développeur tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.

Outils de code conçus pour les développeurs avec coloration syntaxique, validation en temps réel et formatage. Couverture complète de JSON, XML, YAML, SQL et plus.

Chargement de l'outil...

How to use

  1. 1 Ouvrez la page de l'outil Base64 Convertisseur.
  2. 2 Collez votre texte, URL ou données dans la zone de saisie.
  3. 3 Choisissez le mode d'opération et les paramètres.
  4. 4 Exécutez l'outil et consultez le résultat.
  5. 5 Copiez ou téléchargez le résultat.

Why we built this tool

As developers ourselves, we kept switching between scattered tools that sent our code to unknown servers. We built this developer suite so formatting, validation, and conversion all run locally — your code stays yours.

About Base64 Convertisseur: what you should know

Developers handling JWTs, SSO tokens, binary data in web contexts, or email attachments. Base64 is everywhere in modern web stacks — it encodes OAuth client secrets, data URIs for inline images, and file uploads to APIs that expect string payloads instead of multipart form data.

Key features

  • Text ↔ Base64 with UTF-8 Awareness — Unicode characters, emoji, and accented letters all encode and decode correctly. Traditional ASCII-only converters silently corrupt non-English strings — this one handles the full UTF-8 range.
  • File-to-Base64 Data URI — Drag an image or document and get a complete `data:image/png;base64,...` string ready to paste directly into HTML or CSS. Useful for embedding small assets without an extra network round-trip.
  • JWT Header Payload Inspector — Paste a JWT token and instantly see the decoded header and payload JSON — great for quickly verifying which claims (issuer, expiry, audience) are present without spinning up a JWT debugging service.

Common use cases

  • Building Data URI Inline Assets — Inline small SVG icons or favicons into a single CSS file to reduce HTTP requests during initial page load. Base64-encode the file first, then wrap it with the correct data URI prefix.
  • Encoding OAuth Client Secrets — Many OAuth providers send client_id:client_secret pairs as Base64-encoded Basic Auth credentials. Encode the pair on this tool before hitting the /token endpoint — saves you from wrestling with curl headers manually.

Questions fréquentes

Cet outil est-il gratuit ?

Oui, entièrement gratuit sans inscription.

Puis-je l'utiliser sur mobile ?

Oui, il fonctionne sur les navigateurs mobiles avec support tactile.

À quelle catégorie appartient-il ?

Développeur

Quels formats de langages de programmation sont pris en charge ?

Prend en charge JSON, XML, YAML, SQL, CSV, TOML et plus, ainsi que la conversion de format de code pour Java, Python, TypeScript, etc.

What code and data formats are supported for formatting and validation?

ToolPure supports JSON, XML, YAML, TOML, CSV, SQL, and Markdown formatting. Validation includes syntax checking, schema validation for JSON, and well-formedness checking for XML.

Can I convert between different data formats?

Yes, you can convert between JSON, XML, YAML, CSV, and TOML. The converter preserves data types, nested structures, and array indices during conversion.

Is there a file size limit for code formatting?

Files up to 10MB can be formatted without issues. For larger files, the tools use Web Workers to prevent UI freezing. Syntax highlighting supports files with up to 100,000 lines.

Is Base64 Convertisseur safe? Is my data uploaded or stored?

Yes. Base64 Convertisseur is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.

🔒 Privacy & Security:All processing happens locally in your browser. Files are never uploaded or stored.

🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.

📖 How-To Guides

🏆 Best Tools Lists