Paste a Base64-encoded JSON string and instantly get beautifully formatted, syntax-highlighted JSON. Perfect for decoding API payloads, JWT claims, and configuration data.
APIs, webhooks, and configuration files often transmit JSON data as Base64-encoded strings. This tool decodes the Base64 encoding and formats the resulting JSON with proper indentation and syntax highlighting.
The formatter validates the JSON structure and catches common issues like trailing commas, missing quotes, or unescaped characters. Choose between 2-space, 4-space, or tab indentation.
The tool will show you the decoded text and indicate that it's not valid JSON. You can still see the raw decoded output. Try the Base64 to Text tool for non-JSON content.
This tool decodes one level of Base64 encoding. If your JSON contains Base64-encoded values, decode the outer layer first, then decode individual values separately.
Yes. After decoding, the tool parses the JSON and reports any syntax errors including the position of the error. Valid JSON is displayed with proper formatting.
Codifica o decodifica cadenas Base64 directamente en tu navegador
Convierte texto a Base64 o decodifica Base64 a texto plano
Convierte imágenes a cadenas codificadas Base64
Decodifica cadenas Base64 a imágenes visibles
Codifica cualquier archivo a una cadena Base64
Decode any Base64 string back to its original file
Decodifica cadenas Base64 a documentos PDF
Decodifica e inspecciona tokens JWT
Codifica o decodifica URLs con codificación porcentual
Convierte caracteres especiales a entidades HTML y viceversa
Convierte entre formatos hexadecimal y Base64
Decode Base64 strings to plain readable text
Check if a string is valid Base64 encoding
Generate Base64 data URIs from text or files
Convert Base64 strings to hexadecimal and back
Convert SVG to data URIs for CSS and HTML
Encode text to UTF-8 bytes or decode bytes to text