Extend Straight Segments

Extend Straight Segments

Script for Adobe Illustrator

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Description

The Extend Straight Segments script allows you to interactively extend or trim the straight segments of open paths in Adobe Illustrator. It's particularly useful for adjusting line endings without redrawing paths.

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Features

  • Works exclusively with open paths.
  • Intelligently targets only straight line segments.
  • Interactive adjustment via a slider or direct input.
  • Supports extension (>100%) or trimming (<100%) of segments.
  • Real-time preview of changes.
  • Cancel option to restore original paths.

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50% trims the segments, 100% no change, 200% extends the segments

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Installation

1. Download the Extend Straight Segments.jsx script file.

2. Place it in your Adobe Illustrator Scripts folder:

⮑ Mac: /Applications/Adobe Illustrator [Version]/Presets/<Language>/Scripts/

⮑ Windows:C:\Program Files\Adobe\Adobe Illustrator [Version]\Presets\<Language>\Scripts\

3. Restart Illustrator if it's already running.

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Using the Script

  1. Select Open Paths:
    First, select one or more open paths in your Illustrator document.

  2. Run the Script:
    Execute the script from File > Scripts > Extend Straight Segments.

  3. Adjust with Slider:
    In the dialog window, use the slider to interactively adjust the length of the straight segments.

  4. Direct Value Input:
    Alternatively, enter a specific percentage value in the text box.

  5. Preview Changes:
    The script provides a real-time preview as you adjust the slider or input value. Use the 'Preview' checkbox to compare before and after states while fine-tuning your adjustments.

  6. Apply or Cancel:
    Click "OK" to apply the changes. Click "Cancel" to discard changes and restore the original paths.

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Additional Notes

  • Move the slider right (>100%) to extend the segments.
  • Move the slider left (<100%) to trim the segments.
  • 100% represents the original length (no change).
  • Use arrow keys (↑/↓) to adjust value by 1%.
  • Hold Shift + arrow keys to adjust value by 10%.
  • The script only works with open paths (closed paths are ignored).
  • Only straight segments at path endpoints will be modified.
  • Endpoints with Bezier curves (smooth corners) will be preserved.
  • Click the icon ⏼ in the bottom right corner to access the user guide.

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Wrap-up

The Extend Straight Segments script streamlines your Illustrator workflow by providing precise control over path endpoints.

With its intuitive interface and real-time preview, you can quickly adjust multiple open paths simultaneously without having to manually redraw or recreate elements.

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Extend Straight Segments

Version: 1.0.0

Updated:

Download Extend Straight Segments

  • 1.0.0 – Initial release.

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    Tested on MacOS:

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    • Adobe Illustrator 2023 (27.0)
    • Adobe Illustrator 2024 (28.1)
    • Adobe Illustrator 2025 (29.0)

  • Supported Versions:

    • Compatible with Adobe Illustrator CS6 and later, including Adobe Illustrator CC versions.

    Operating Systems:

    • Works on both macOS and Windows platforms.

  • End User License Agreement (EULA)

    Last Updated: 21.12.2024

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    This End User License Agreement (“Agreement”) is a legal agreement between you (“User” or “Licensee”) and Samolevsky.com (“Licensor”) regarding the use of the Adobe Illustrator scripts (“Software”). By downloading, installing, or using the Software, you agree to be bound by the terms of this Agreement.

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    1. Grant of License

    Licensor grants the User a non-exclusive, non-transferable, and revocable license to use the Software in accordance with this Agreement.

    • Free Software: If the Software is provided for free, you may use it for personal or commercial purposes without payment, subject to the restrictions outlined in this Agreement.
    • Paid Software: If the Software is provided for a fee, you may use it only after payment has been made in full.

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    2. Usage Rights

    You are permitted to:

    • Install and use the Software on devices you own or control.
    • Use the Software in your personal or commercial projects, subject to compliance with this Agreement.

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    3. Restrictions

    You may NOT:

    • Reverse engineer, decompile, or otherwise attempt to discover the source code, underlying ideas, or algorithms of the Software.
    • Reuse, incorporate, or integrate any portion of the Software into any other software, product, or project, except as expressly permitted by the Licensor in writing.
    • Resell, redistribute, or share the Software, whether in its original or modified form, without prior written consent from the Licensor.
    • Claim ownership of the Software or its underlying code.
    • Use the Software in any way that violates applicable laws or regulations.

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    4. Ownership

    The Software and all intellectual property rights therein remain the exclusive property of the Licensor. This Agreement does not transfer ownership of the Software or any intellectual property rights to the User.

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    5. Disclaimer of Warranties

    THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL THE LICENSOR BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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    6. Limitation of Liability

    To the maximum extent permitted by law, Licensor shall not be liable for any damages, including but not limited to direct, indirect, incidental, special, or consequential damages, arising out of or related to the use or inability to use the Software.

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    7. Termination

    This Agreement is effective until terminated. Licensor may terminate this Agreement immediately if you breach any term of this Agreement. Upon termination, you must cease all use of the Software and destroy any copies in your possession.

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    8. Updates and Support

    Licensor is not obligated to provide updates, support, or maintenance for the Software. However, updates may be provided at the sole discretion of the Licensor.

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    9. Governing Law

    This Agreement shall be governed by and construed in accordance with the laws of the State of New York, without regard to its conflict of law principles.

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    10. Entire Agreement

    This Agreement constitutes the entire agreement between you and the Licensor concerning the Software and supersedes all prior or contemporaneous understandings regarding such subject matter.

    By using the Software, you acknowledge that you have read this Agreement, understand it, and agree to be bound by its terms.

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    For any questions or concerns regarding this Agreement, please contact us at hello@samolevsky.com

Required Software

Adobe Illustrator

Learn more

Adobe Illustrator is a professional vector graphics software developed by Adobe Inc. It is widely used by designers, illustrators, and artists for creating a variety of digital artwork, including logos, icons, illustrations, typography, and complex design layouts. Illustrator is known for its precision and scalability, allowing users to create high-quality graphics that can be resized without losing clarity. Its features include powerful drawing tools, customizable brushes, advanced typography options, and seamless integration with other Adobe Creative Cloud applications. Illustrator is a go-to tool for creative professionals working on projects for print, web, and multimedia platforms.

  • 🅰 Locating the Scripts Folder

    To install a Extend Straight Segments.jsx script in Adobe Illustrator, you need to place it in the correct directory where Illustrator
can recognize it. Follow these steps to locate the Scripts folder:

    1. MacOS:
      Open Finder and navigate to:
      Applications/Adobe Illustrator <Version>/Presets/<Language>/Scripts.
    2. Windows:
      Open File Explorer and navigate to:
      C:\Program Files\Adobe\Adobe Illustrator <Version>\Presets\<Language>\Scripts
    3. Replace <Version> with your Adobe Illustrator version (e.g., 2025).
    4. Replace <Language> with your language folder (e.g., "de_DE" for German, "en_US" for English).

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    🅱 Installing the Script

    1. Copy the Script File: Copy the Extend Straight Segments.jsx file to the Scripts folder located in the path above.
    2. On some systems, you may need administrator permissions to modify the Scripts folder.
    3. Restart Adobe Illustrator: To refresh the scripts menu, close and reopen Adobe Illustrator.

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    Explore our complete guide to mastering Adobe Illustrator scripts.

    1. Open Adobe Illustrator and ensure a document is active.
    2. Go to the top menu bar and select File > Scripts.
    3. If the script is installed in the Scripts folder, it will appear in the dropdown list.
    4. Click the Extend Straight Segments script to run it.
    5. The Extend Straight Segments script will execute, and any dialog boxes or results will appear based on the script’s functionality.

    ☻ Before running any scripts, it’s strongly advised to save your work — especially when working with complex or large documents.

Got questions?

Need help or have an idea to share? We’d love to hear from you! Whether you have questions, found a bug, have a feature request, or just want to share your feedback, reach out to us—we’re here for you! 

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