Base64 Encode / Decode
Paste text or drop in a file to encode it to Base64, decode Base64 back to a downloadable file, or emit a data URI — UTF-8 safe, with a URL-safe variant, in your browser.
How to use the Base64 tool
Encode or decode in four steps.
- 1
Choose Encode or Decode
Use the mode toggle to pick a direction. Encode turns text into Base64; Decode turns Base64 back into readable text.
- 2
Paste your input
Drop in the text or Base64 string you want to convert. The output updates live as you type, with full UTF-8 and emoji support.
- 3
Copy the result
Toggle the URL-safe variant if you need it, then copy the converted output with one click — no sign-up and no rate limits.
- 4
Store real secrets in Envless
Remember that Base64 is just encoding, not encryption — anyone can decode it. Keep real secrets, like the values inside a Kubernetes Secret, end-to-end encrypted in Envless.
Why use the Envless Base64 tool?
A fast, private encoder/decoder from a team that builds encrypted secret management for a living.
Encode and decode both ways
Flip between Encode and Decode with one toggle. Turn plain text into Base64, or paste a Base64 string and read the original text back instantly.
UTF-8 safe for Unicode and emoji
Multi-byte characters, accents, and emoji round-trip correctly. The encoder uses proper UTF-8 handling so nothing gets mangled on the way back.
Optional URL-safe variant
Switch to URL-safe Base64 to swap + and / for - and _ and drop padding, so the output drops cleanly into query strings, JWTs, and file names.
100% client-side and private
Your text never leaves your browser. No uploads, no logging, no network calls — all encoding and decoding happens entirely on your device.
Base64 file and data URI output
Drop in any file to Base64-encode it, decode a Base64 string back into a downloadable file, or switch to data URI output to inline images, fonts, and other assets straight into your code.
Base64 FAQ
Everything you need to know about Base64 encoding and decoding.
Yes. Encoding and decoding run 100% in your browser. Whatever you paste never leaves your device — there are no uploads, no logging, and no network requests.
No. Base64 is reversible encoding, not security. Anyone can decode a Base64 string back to the original in seconds, so it provides zero confidentiality. Never treat Base64 as a way to protect passwords, tokens, or other secrets.
URL-safe Base64 replaces the + and / characters with - and _ and usually omits padding, so the result can be used in URLs, query strings, JWTs, and file names without escaping. Toggle the URL-safe variant to produce this format.
Yes. The tool encodes and decodes using UTF-8, so accented characters, non-Latin scripts, and emoji round-trip correctly instead of turning into broken or garbled output.
Base64 is used to embed binary data as text — for example, data URIs for inline images, the credentials in HTTP Basic auth headers, and the values inside Kubernetes Secret manifests. It makes binary safe to transport over text-based protocols.
Because Base64 offers no protection, store real secrets in Envless, where values are end-to-end encrypted so your team can share, rotate, and audit access without plaintext exposure. To produce manifests from your variables, try the Kubernetes Secret generator sibling tool.
Yes. Drop in or pick a file to encode it to a Base64 string entirely in your browser, and decode a Base64 string back into a downloadable file. You can also switch to data URI output to produce a ready-to-paste data: URL for inlining images, fonts, and other assets in HTML or CSS.
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