Encoding
Base64 Encode
Encode plain text into Base64.
Encoding
Base64 Decode
Decode a Base64 string back to plain text. Useful for inspecting JWT payloads, decoding values from HTTP headers, or reading data URLs.
Riepilogo dello strumento
Questo strumento accetta input strutturati e restituisce output deterministici nel browser, senza upload al server.
- Nome dello strumento
- Base64 Decode
- Intento dell'input
- Fornisci il contenuto di origine da trasformare, validare o analizzare.
- Intento dell'output
- Ricevi un output normalizzato adatto a copia, riutilizzo o debug.
- Esempio di input
- SGVsbG8sIHdvcmxk
- Esempio di output
- Hello, world
Decoded text will appear here after you click Decode.
Introduzione allo strumento
Decode a Base64 string back to plain text. Useful for inspecting JWT payloads, decoding values from HTTP headers, or reading data URLs.
Panoramica dello strumento
Base64 is a reversible encoding that maps every 3 bytes of input to 4 ASCII characters. This tool reverses that mapping and renders the result as UTF-8 text. If the input contains characters outside the Base64 alphabet, or the length is wrong, decoding fails and the tool reports "Invalid Base64".
Casi d'uso
- Use Base64 Decode when you need fast decode base64 back to readable text.
- Handle encoding workflows directly in the browser with no install required.
- Support SEO long-tail intent by covering quick checks, troubleshooting, and one-off conversions.
Esempi di input/output
Intento dell'input
SGVsbG8sIHdvcmxk
Intento dell'output
Hello, world
FAQ
What does "Invalid Base64" mean?+
The input contains characters outside the Base64 alphabet (A–Z, a–z, 0–9, +, /, =), or its length is not a multiple of four after padding.
Can it decode binary files?+
This tool decodes to UTF-8 text. Binary data (images, archives) will appear as gibberish; for those, use a desktop tool that writes the result to a file.
Does it support URL-safe Base64?+
It uses the standard alphabet. URL-safe Base64 replaces + with - and / with _ — convert those characters back before pasting.
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