Decodificador Base64
Decodifique strings Base64 de volta para texto simples (com suporte a UTF-8). Cole um ou mais valores Base64 — cada linha é decodificada separadamente.
Entrada
Vários valores? Coloque cada string Base64 em sua própria linha.
Saída
Cuidado: trate o conteúdo decodificado com cuidado — pode ser sensível ou executável.
Guias
What is Base64?
Base64 is an encoding that represents binary data using 64 safe ASCII characters (A–Z, a–z, 0–9, +, /). It's everywhere: email attachments, data URLs, JWT tokens, API payloads and configuration files. It is encoding, not encryption — anyone can reverse it, which is exactly what this tool does.
How to use it
- Paste a Base64 string into the input (whitespace and line wrapping are tolerated).
- Hit Decode — the plain-text result appears on the right, with full UTF-8 support for accents, emoji and non-Latin scripts.
- Decode several values at once by putting each on its own line.
When you'd reach for it
- Inspecting the payload of a JWT segment or an API response field.
- Reading Base64 blocks in email source or
.env/YAML configs. - Checking what's inside a data URL before trusting it.
Caution: decoded content can be sensitive or executable — handle it accordingly.
Privacy
Decoding happens entirely in your browser; your data never touches a server.
Use it from code
From 3 credits per callREST API
curl -X POST https://api.iotools.cloud/v1/tool/base64-decode \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"base64String": "SGVsbG8gV29ybGQh"
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `base64-decode` tool (Base64 Decode) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.
Parte de um fluxo de trabalho
Todas as coleçõesEighteen tools for the things people mix up daily — encoding versus encryption, which hash belongs on a password, and what an HMAC is actually for. Everything runs in your browser, so nothing you paste is uploaded.
Thirty-one tools for everything a URL can become: its raw HTML, clean text, Markdown, structured JSON or XML, a screenshot, a PDF, or a QR code — plus tools to inspect its meta tags, heading outline, links, and IP addresses without opening it. Every live-fetch tool here runs server-side, so it works even on sites that block cross-origin requests from a browser. Round it out with a combined multi-scheme encoder/decoder and the focused single-purpose tools underneath it.