Base64 Encoder/Decoder for Env Values

Base64 is the classic escape hatch for configuration: it lets a value containing a newline, a quote, or a non-ASCII character travel through a system that only accepts safe text. The Base64 Encoder/Decoder applies it precisely — one value at a time, or the whole .env in batch.

Two features keep it dependable. First, everything goes through UTF-8, so accented characters and emoji survive a round trip instead of turning into mojibake. Second, a URL-safe mode switches the alphabet to - and _, for values destined to live inside URLs, tokens or query strings.

The tool runs fully in your browser — nothing is uploaded, and multi-line values are handled as complete units.

• Per-value encode/decode: split by lines or custom separator.
• Batch file mode: all values in a .env at once.
• UTF-8 safe: emoji and non-Latin scripts preserved.
• URL-safe alphabet: - and _ instead of + and /.
• Padding control: include or strip = padding.
• Round-trip clean: decode(encode(x)) == x.
• Copy or download: export results.
• Private: 100% in-browser.

1. Choose direction (encode or decode) and alphabet (standard or URL-safe).
2. Paste values — one per line — or a whole .env file in batch mode.
3. Click Convert. Every value is transformed independently.
4. Copy or download the result.

Example 1 — Newline in a secret. A PEM key contains newlines that break a single-line parser; base64-encoding the value keeps it intact.

Example 2 — CI build arg. A build pipeline accepts only simple strings; the team base64-encodes the SSH key before passing it as an argument.

Example 3 — URL-safe token. A signed value goes into a query string; URL-safe mode keeps the + and / out of the URL.

Example 4 — Emoji in config. A product name with accented characters survives a full encode/decode round trip thanks to UTF-8 handling.

Example 5 — Batch decode of a dump. A mis-encoded .env is pasted in batch mode and restored in one click.

• Precise per-value: no accidental cross-line joins.
• Batch power: whole files in one pass.
• Unicode safe: UTF-8 under the hood.
• Two alphabets: standard and URL-safe.
• Private: nothing uploaded.
• Free: always available.