Is Base64 encryption?

No. It is reversible encoding—never rely on it for secrecy.

Why invalid character errors?

Standard and URL-safe alphabets differ; pick the mode your upstream uses.

Base64 Encoder / Decoder

In the same workflow: Webhook Tester and API Response Analyzer.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 to text. Handles URL-safe alphabet (replace - and _ with + and /).

Mode

Base64 string

Decoded output

{"alg":"HS256"}

Related tools

JWT Decoder — decode JWT payload (Base64)
Bearer Token Extractor — Authorization header

Why use Base64 Encoder / Decoder?

Base64 shows up in Basic auth, JWT segments, and binary-safe JSON transports. Encode or decode text with optional URL-safe alphabets to debug serialization bugs without juggling command-line one-liners on locked-down laptops.

Practical tips

URL-safe mode matters for JWT and many query parameters.
Watch for newline insertion when copying from terminals.
Pair with Bearer Token Extractor when debugging Authorization headers.

Common questions

Is Base64 encryption?: No. It is reversible encoding—never rely on it for secrecy.
Why invalid character errors?: Standard and URL-safe alphabets differ; pick the mode your upstream uses.

About

Base64 encode/decode: text to Base64, Base64 to text. URL-safe supported. Free encoder decoder. No signup.

Related tools

Used together

Next step

After base64-encoder-decoder, continue with Webhook Tester to validate the next API or webhook layer.