Base64 Encoder/Decoder - Convert Text to Base64 and Back Online

Encode and decode Base64 text directly in your browser.

No signup
Local-first
Free limit: Text input

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Base64 is a transport format, not a security feature. It is commonly used in tokens, payloads, and text-based transmission workflows, but it should never be treated as encryption.

Everything runs in the browser, which makes it convenient for quick debugging without exposing data to third-party services.

Common uses for Base64 Encoder/Decoder

Typical tasks this tool is built for.

Decode Base64 strings from logs, APIs, or tokens.
Encode short values for text-based transport.
Test integrations that require Base64 fields.
Inspect encoded payload content during debugging.

How to use Base64 Encoder/Decoder

Step 1. Choose encode or decode mode.
Step 2. Paste the text or Base64 string into the input.
Step 3. Run the conversion and review the output.
Step 4. Copy the result — remember Base64 is not encryption.

Why use this tool?

Encode text to Base64 or decode Base64 back to readable text.
Useful for API debugging, data URIs, and transport-safe strings.
Runs entirely in the browser for quick checks.

Privacy and formats

Encoding and decoding run locally in your browser. Base64 is not encryption — do not use it to hide secrets.

Input: TextOutput: Processed text

Best results with Base64 Encoder/Decoder

Practical tips before you download or share the output.

Base64 increases data size and does not protect secrets. Use real encryption for confidential information.

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Common problems this tool helps with

Situations where this workflow saves time.

Treating Base64 as security — it is encoding only.

Wrong padding — malformed Base64 strings fail to decode.

Binary data pasted as text — some outputs are not human-readable.

Frequently asked questions

Is Base64 encryption?

No. Base64 encodes data for text-safe transport. Anyone can decode it without a secret key.

Is my input sent to a server?

No. Encoding and decoding run locally in your browser.

Why did decode fail?

Check for invalid characters, missing padding, or URL-safe variants. Remove whitespace and try again.

When should I use Base64?

Common cases include embedding small assets in data URIs, debugging API payloads, and testing systems that expect Base64 fields.

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