Yes. All 42 tools are 100% free with no signup, no ads in your face, and no hidden limits. The core tools will always be free.

Do AHX tools upload my data to a server?

No. Every tool runs entirely in your browser using JavaScript. Your data never leaves your device.

Can I use AHX offline?

Yes. Once the page has loaded, every tool works without an internet connection. AHX is installable as a PWA.

Is Base64 Encoder / Decoder free?

Yes. Base64 Encoder / Decoder is 100% free with no signup and no usage limits.

Does Base64 Encoder / Decoder upload my data?

No. Base64 Encoder / Decoder runs entirely in your browser. Your data never leaves your device.

Do I need to install anything?

No. Base64 Encoder / Decoder works in any modern web browser. Just visit the page and start using it.

AHX

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text.

URL-safe (−_ instead of +/)

Plain text

Base64 output

Runs entirely in your browser. No data leaves your device.

About Base64 Encoder / Decoder

Encode any text to Base64 or decode Base64 back to plain text. Our tool is UTF-8 safe, meaning it correctly handles international characters, emoji, and non-Latin scripts — most Base64 decoders break on these. Switch between encode and decode with one click.

Common use cases

Decode a Base64-encoded API token or JWT
Encode a username:password pair for HTTP Basic Auth
Decode Base64 image data from a data URL
Encode international (UTF-8) text safely
Inspect the contents of a Base64-encoded string

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