Pixelcut
A before-and-after comparison showing a line art illustration of a cat. The 'before' image has thin lines, and the 'after' image shows the same cat with much thicker, bolder lines, demonstrating a line thickener tool.

Make Lines in Your Images Thicker with AI

Trusted by 70 million people
171,800 Reviews
Developer API
Available on iPhone & Android

How to Make Lines Thicker

  1. 1

    Upload your image

    Start by uploading the drawing, illustration, or logo you want to edit. The tool works best with clear line art.

  2. 2

    Enter your prompt

    Tell the AI how you want to change the lines. Be specific, for example: 'Make all the lines in this sketch much thicker.'

  3. 3

    Generate your image

    Click the generate button and let the AI process your request. Your new image with bolder lines will appear in seconds.

  4. 4

    Download your image

    Your image with thickened lines is ready. Download it as a high-resolution PNG file to use in your projects.

Give your illustrations and designs more impact by making the lines thicker. Forget complex software with confusing tools. With Pixelcut, you just upload your image, type a simple instruction, and watch as the AI intelligently thickens the lines for you. This is perfect for artists who want to prepare a drawing for coloring, designers who need to make a logo more pronounced, or anyone wanting to add weight and emphasis to their line art. The process is quick, intuitive, and gives you a bold new look in just a few clicks.

Instantly Bold Your Line Art

A before-and-after comparison showing the effect of a line thickener tool. On the left, a mountain range is drawn with a very thin line, and on the right, the same drawing has a very thick, bold line.
Thin lines can get lost when an image is resized or viewed on a small screen. By increasing the line weight, you ensure your artwork remains clear and visible in any context. This is especially useful for detailed illustrations, technical drawings, or icons that need to be easily readable. Our AI tool analyzes your image and applies a consistent thickness, preserving the original detail and integrity of your work while making every line stand out. The result is a sharper, more defined image that grabs attention.

Enhance Detail and Visibility

A minimalist drawing of a stag's head split in two styles. The left side uses thin, delicate lines, while the right side uses thick, bold lines, demonstrating the effect of a line thickener tool.
Turn a delicate sketch into a strong graphic ready for any application. Thickening the lines of your drawing can completely change its character, making it suitable for everything from t-shirt designs to tattoo stencils. Simply upload your artwork, and our AI can help you prepare it for a variety of uses without manual tracing. It’s a fast and simple way to adapt your creative work for different mediums, ensuring your lines are strong enough for printing, engraving, or digital display, all while maintaining high resolution.

Refine Illustrations for Any Project

A before-and-after style illustration showing the effect of a line thickener. The left side features a fern leaf drawn with very thin lines, while the right side shows the same leaf with bold, thick lines.
It’s Effortless: No more tedious manual adjustments in complicated software. Just upload and type. It’s Precise: Our AI intelligently detects lines and thickens them uniformly for a clean, professional look. It's Fast: Transform your image's line weight in seconds, not hours. It’s Versatile: Perfect for artists, designers, and hobbyists working with line art, logos, or sketches. It’s Free to Try: Experiment with different line thicknesses and see the results for yourself at no cost.

Why use Pixelcut's AI Line Thickener?

A before-and-after illustration of a lion's head, showing the effect of a line thickener. The left side is drawn with thin lines, and the right side is drawn with thick, bold lines.
Coloring Pages: Thicken the outlines of a drawing to create clear, bold coloring book pages. Tattoo Stencils: Make sure your tattoo design is clear and easy to follow by creating a stencil with thicker lines. Craft Projects: Prepare designs with bolder lines for Cricut machines, laser cutting, or engraving. Logo & Icon Design: Increase the impact of logos and icons by making their lines more substantial and visible. Digital Art: Adjust the line weight of your digital illustrations to create emphasis and improve composition.

Line Thickener Use Cases

A side-by-side comparison of a house illustration. The left side is drawn with very thin lines, and the right side is drawn with very thick, bold lines, demonstrating the effect of a line thickener.

Frequently Asked Questions

Pixelcut is loved by over 2 million people

  • My favorite app

    Great app, easy to use. Helps our small business save time and money to create different marketing materials professionally. Thank you.
    Shaelyn D.
  • Best background remover

    I need a good background remover for my work and I've been through them all it feels like. This one is the best by far. It's so easy to use and the results always look amazing. Thank you Pixelcut!
    Kira H.
  • Love it

    It's amazingly easy and gives the perfect results for my bags and accessories. It looks like it was done by a professional photographer.
    Mary J.