.env Formatter / Validator

Keys are case-sensitive ASCII letters/underscore followed by letters/digits/underscore. Duplicate keys are refused, not overwritten. Optional lowercase export followed by space/tab is preserved when formatting. Assignment order and comments are preserved; blank lines are removed. Spaces/tabs around keys and unquoted values are trimmed; interior whitespace is literal. Empty values are supported. LF, CRLF and CR input lines become LF output with a final newline.

Single quotes are literal (no escapes). Double quotes support only backslash-backslash, backslash-double-quote and backslash-t (tab). Quoted # and = are literal. In unquoted values, # begins a comment only at the start or after space/tab; other # and = are literal. Unquoted quotes/backslashes and trailing text after closing quotes are refused; a trailing comment must have separating whitespace. Formatting always emits escaped double-quoted values.

Multiline values, continuation, dollar signs and backticks in values (even quoted), unknown escapes, NUL/other controls, invalid Unicode and Unicode line separators are unsupported and refused. No shell sourcing, command execution, interpolation, host-variable resolution, network requests, automatic file reads or environment writes occur in the transformation.

JSON conversion accepts only a flat object with unique supported keys and string values; numbers, null, nested objects, arrays, unsupported strings and empty objects are refused. Dotenv to JSON refuses all comments and export markers to avoid loss. JSON preserves value meaning and order, not original quoting, blank lines or source layout. JSON semantic errors identify line 1 (object-level); syntax errors identify the parser line. Output may be longer than the 4096-character input limit.

Ordinary native edits clip before transport at 4098 UTF-16 characters. Oversize edits are refused, never processed as clipped prefixes; input, verdict and stale output/Copy are cleared. Shorten and re-enter text, or Clear. Native limits do not certify hostile programmatic assignments or every IME. Errors never echo supplied keys or values.

No payload logging, telemetry, storage or persistence is added by this tool. Copy is explicit and includes all output values/comments. Website discovery is active; extension/Android metadata is inactive, not hard route denial. This dialect is not a guarantee of compatibility with every dotenv loader; verify your target separately.