Visual Assets & Diagrams

Create shareable visual assets in the browser — QR codes, barcodes, signatures, pixel art, Venn diagrams and ratio/DPI helpers. Use QR/Barcode generators for scannable codes, the Signature and Pixel Art makers for graphics, and Aspect Ratio/DPI for sizing exports.

7 free tools — no downloads, no sign-up.

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Aspect Ratio Calculator

Aspect ratio calculator. YouTube, Instagram, TikTok presets.

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Barcode Generator

CODE128, EAN-13, UPC barcodes. Download SVG/PNG.

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DPI & PPI Calculator

Calculate screen pixel density. For designers and developers.

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Pixel Art Maker

Draw pixel art on a customizable grid. 24-color palette, 3 grid sizes, click-and-drag drawing, and PNG export. Free, no sign-up.

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QR Code Generator & Scanner

Create and scan QR codes instantly. No app needed.

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Signature Generator

Create a beautiful handwritten signature. Download as PNG.

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Venn Diagram Maker

Create beautiful 2-circle and 3-circle Venn diagrams. Customize colors, labels, and intersection text. Export as SVG or PNG. Free, no sign-up.
Related: CSS & Color · Images & PDF · All Design, Images & Documents →

Frequently asked questions

Can I download the output?

Yes, generated assets such as QR codes and signatures can be saved as image files.

Is the QR code generator free?

Yes, all generation is free and runs locally with no watermark.

What is the Aspect Ratio tool for?

It calculates matching dimensions so images and video keep the correct proportions.