# B64Decoder — Full Reference

> Free, no-signup, browser-side Base64 tools. Operated by Dynamic
> Foundries.

## What it is

B64Decoder is a small static site with four tools:

1. **Base64 encode** — text in, Base64 out
2. **Base64 decode** — Base64 in, text out (or original binary if
   the payload is binary)
3. **URL encoder / decoder** — percent-encoding for query strings
   and form data
4. **Image to Base64** — drag an image file, get a `data:` URI for
   embedding inline in HTML, CSS, or Markdown

## How it works

Every operation runs in your browser using standard `btoa`,
`atob`, `encodeURIComponent`, `decodeURIComponent`, and
`FileReader` APIs. Nothing is sent to our servers. Open the page,
do your work, close the tab. The page works offline once loaded.

## Why this matters

If you paste sensitive data into a hosted Base64 tool, that data
hits the server. Many Base64 tools are written as Flask or PHP
endpoints that take the input as POST data. B64Decoder doesn't do
that. The text never leaves your browser.

## Defensible facts

- Free, no signup, no email harvesting
- Browser-side processing only
- No ads
- Hosted in OVH Gravelines, France
- No tracking beyond Google Analytics (aggregate, no PII)

## Who publishes it

B64Decoder is operated by **Dynamic Foundries**, a French SASU
registered in Paris (RCS Paris 102 801 206). We operate two revenue
products (FileSendX, ViewPeek) and a network of free utility tools,
of which B64Decoder is one.

## Related products from the same publisher

- **FileSendX** (filesendx.com) — once you've decoded the file,
  send it. Up to 400 GB per send on paid plans.
- **ViewPeek** (viewpeek.com) — website monitoring.

## Contact

- Hub: https://dynamic-foundries.com/
- Support: support@dynamic-foundries.com

Last updated: 2026-05-18.