Perfect Corner ✦ Adobe illustrator Script

Perfect Corner Radius — Nested Rounding Made Correct, Instantly

Fix the most common corner-radius mistake in design: mismatched rounding between nested rectangles. Perfect Corner Radius selects your outer container and inner card, auto-detects the padding between them, and applies the mathematically correct rule — Outer Radius = Inner Radius + Padding — so your corners stay perfectly concentric instead of looking pinched or uneven.

Features:

Auto-detects padding — select any two rectangles and the tool instantly measures the gap between them, warning you if it's uneven
Live artboard preview — see the corrected rounded rectangles drawn directly over your dimmed originals in real time, before committing to anything
True native rounded corners — built using Illustrator's real rounded-rectangle geometry, not approximated shapes
Center & Resize option — automatically recenters and resizes the inner rectangle for mathematically perfect, uniform padding on all sides (or turn it off to keep the inner shape exactly where it is)
Arrow-key nudging — click into any radius field and use ↑ / ↓ to fine-tune by 1pt, Shift + ↑ / ↓ for 10pt jumps
Preserves your original fill, stroke, and opacity — only the geometry changes
Automatic radius clamping — never throws an error even on extreme values
Remembers your last settings automatically, with one-click Reset
Lightweight, native JSX — no plugins required

Perfect for app icons, cards, buttons, badges, packaging mockups, and any UI or print design where nested rounded rectangles need to actually look right.

⚡ Fast. Smart. Clean. Save Hours – Create Visuals Effortlessly.

✦ Installation Guide

Extract the .zip File

Copy your ".jsx" script file into the appropriate folder based on the application. Windows or MacOS

Windows: C:\Program Files\Adobe\Adobe Illustrator [version]\Presets\Scripts

MacOS: /Applications/Adobe Illustrator [version]/Presets/Scripts

Open the Adobe Illustrator
Go to the File > Scripts menu.
Your script should now appear in the list. Select it to run the script.

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