Reset italic (SGR 23)

Category: sgr · Tags: ECMA-48 Standard · Specification ↗

SGR 23 resets the italic (SGR 3) attribute, returning text to upright rendering. The sequence is ESC [ 23 m. This is a targeted reset that does not affect other active attributes like bold, underline, or colors.

How this is tested: Send \x1b[3mX\x1b[23mY, verify the second cell has italic=false.

Supported by 11 of 11 backends (100%)

Terminal Applications

Terminal	Version	Support	Notes
iTerm2	3.6.9	✓ yes
Ghostty	1.3.1	✓ yes
VS Code	1.112.0	✓ yes
Cursor	2.6.21	✓ yes
Kitty	0.46.2	✓ yes
Terminal.app	2.15	✓ yes
Warp	0.2026.03.18.08.24.03	✓ yes

Headless Backends

Parser correctness only — a ✓ means the parser accepts the sequence.

Backend	Version	Support	Notes
Alacritty	0.26.0	✓ yes
vt100	0.2.1	✓ yes
vterm	0.2.0	✓ yes
WezTerm	0.1.0-fork.5	✓ yes

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