Base64 Encoder ⇆ Decoder
Encode any text to **Base64** or decode any Base64 string instantly. Runs entirely in your browser.
When should you use this Base64 Encoder ⇆ Decoder?
- Encode text or data to Base64 for APIs and data transfer
- Decode Base64 strings back to readable text
- Debug API requests, headers, or payloads
- When you need quick Base64 conversion directly in the browser
Example use case:
You’re working with an API that requires data to be sent in Base64 format. Use this tool to encode plain text into Base64, or paste a Base64 string to instantly decode it and inspect the original content — all locally in your browser.
Tip: Base64 encoding is commonly used in HTTP headers, tokens, and configuration values, but it’s not encryption — just encoding.
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Base64 Encoder & Decoder FAQ
Use it when you need to encode text or small data into Base64 for safe transfer in JSON, HTTP requests, emails, or configuration files, and decode Base64 back to readable text.
No. Base64 is only encoding, not encryption. Anyone can decode Base64 back to the original data.
Base64 increases size by about 33% because it converts binary or text into a text-safe format using a limited character set.
Common uses include encoding API payloads, sending binary data as text, creating Basic Auth headers, and embedding small assets or strings in configs.
The '=' is padding. It helps Base64 keep data aligned in blocks so it can be decoded correctly.
Base64URL is a URL-safe variant used in JWTs and web tokens. It replaces '+' and '/' with '-' and '_' and usually removes padding.