Base32 Encoder / Decoder
Encode text to Base32 and decode Base32 back to text using the RFC 4648 alphabet. Runs entirely in your browser.
How to use Base32 Encoder / Decoder: Open Base32 Encoder / Decoder — it runs entirely in your browser with no setup. Paste or type your input into the text area, or upload a file where supported. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server. Everything runs inside your browser, so your data never leaves your device.
Tip: drag a text file onto the box above to load it — drop several to append them in order.
Encoded
Encode text to Base32 and decode Base32 back to text using the RFC 4648 alphabet. Runs entirely in your browser. Base32 Encoder / Decoder is a free, browser-based tool in the Filevane developer tools collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use Base32 Encoder / Decoder
- Open Base32 Encoder / Decoder — it runs entirely in your browser with no setup.
- Paste or type your input into the text area, or upload a file where supported.
- Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
- Review the output instantly; large inputs are handled locally without lag.
- Copy the result to your clipboard or download it. Your data never leaves the page.
Why use Base32 Encoder / Decoder?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your data are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full developer tools suite, so related base32 encoder tasks are one click away.
Is it private and secure?
Your privacy is built in. Base32 Encoder / Decoder runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.
Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.
You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.
Learn more
Is It Safe to Paste Production Data Into Online Tools? — JWTs, API responses and env files get pasted into online formatters every day. Here's what actually happens to that data and how to check before you paste.
Frequently asked questions
What is Base32 used for?
Encoding binary data using only A-Z and 2-7 — no lowercase, no digits that resemble letters. Its best-known use today is two-factor authentication secrets: the string an authenticator app scans or that you type in by hand is Base32.
Why use Base32 instead of Base64?
Because it survives being handled by humans and by case-insensitive systems. Base32 is case-insensitive, avoids the confusable pairs 0/O and 1/I, and needs no URL escaping — at the cost of being about 20% longer than Base64.
Why does Base32 output end in equals signs?
Padding. RFC 4648 encodes in 40-bit groups producing 8 characters, so input that is not a multiple of 5 bytes is padded with = to fill the group. Some implementations, including many TOTP setups, omit the padding entirely.
Is Base32 encryption?
No. It is an encoding, fully reversible by anyone, with no key involved. A Base32 string offers no confidentiality whatsoever — which is why a leaked 2FA secret is immediately usable.
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