Web Tools
Sed Command Builder
Build sed one-liners interactively. Supports substitution, line deletion, pattern deletion, insert before/after, print ranges, extract between patterns, trim whitespace, and more. Configure global/case-insensitive flags and in-place editing. Runs entirely in your browser — your data never leaves your machine.
sed cli unix command-line text-processing one-liner
Published May 31, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Select an action (substitute, delete, insert, print, etc.), configure pattern, replacement, and flags, and the tool generates a ready-to-use sed command. Copy and paste directly into your terminal.
Features
- 11 actions: substitute, delete lines, delete by pattern, insert before/after, print range, print by pattern, number lines, remove blank lines, trim whitespace, extract between patterns
- Delimiter support:
/,|,#— use pipe or hash when patterns contain slashes - In-place editing: optional -i flag with configurable backup extension
- Substitution flags: global (g), case-insensitive (I)
- Pattern escaping: automatic escaping of delimiter characters
- 5 examples: find/replace, delete comments, print range, remove blanks, extract config
- Private: all computation runs in your browser — no data transmitted
Use Cases
- Quickly build sed commands without memorizing syntax
- Find and replace text across files
- Extract specific line ranges or pattern matches
- Clean up files (remove blanks, trim whitespace)
- Generate one-liners for shell scripts and CI/CD pipelines