About

In the high-velocity environment of digital marketing, the speed at which visual assets are produced often correlates directly with engagement metrics. This application serves as a client-side layout engine, effectively bridging the gap between heavy desktop publishing software and rigid, template-based mobile apps. It is designed for social media managers, developers, and content creators who require precise control over typography, color theory, and composition without the latency of server-side rendering.

The tool leverages the full capabilities of the HTML5 Canvas 2D Context, allowing for sub-pixel rendering and complex compositing operations. Unlike standard generators that simply overlay text on a picture, this engine computes layer stacking orders, alpha blending, and vector-like font scaling in real-time. This ensures that the resulting raster output maintains edge sharpness and chromatic fidelity, which is vital when assets are compressed by social media algorithms.

From a mathematical perspective, digital image composition relies on Alpha Compositing. When a translucent text layer (source) is drawn over a background (destination), the resulting pixel color C_out is calculated using the linear interpolation formula:

C_out = C_src × α + C_dst × (1 − α)

This tool handles these calculations instantly in the browser, providing a privacy-first workflow where your creative data never leaves your local machine.

Formulas

When resizing images or text to fit a specific container, preserving the Aspect Ratio R is critical to prevent distortion. The aspect ratio is defined as the ratio of width W to height H:

R = WH

To center an element with dimensions w, h inside a canvas of W, H, the top-left coordinates (x, y) are calculated as:

{

x = W − w2y = H − h2

Font size physical scaling on screens relies on Pixel Density (PPI). The legible height h_px for a font size in points pt is approximately:

h_px ≈ pt × PPI72

Reference Data

Platform	Asset Format	Dimensions (px)	Aspect Ratio	Safe Zone (Center)
Instagram	Square Post	1080 × 1080	1:1	100%
Instagram	Portrait	1080 × 1350	4:5	100%
Instagram/TikTok	Story / Reel	1080 × 1920	9:16	1080 × 1420
Twitter (X)	In-Stream	1600 × 900	16:9	N/A
LinkedIn	Shared Image	1200 × 627	1.91:1	N/A
Facebook	Event Cover	1920 × 1005	16:9	1000 × 1005
Pinterest	Standard Pin	1000 × 1500	2:3	N/A
YouTube	Thumbnail	1280 × 720	16:9	N/A
Display Ad	M-Rec	300 × 250	1.2:1	N/A
Display Ad	Leaderboard	728 × 90	8:1	N/A

Frequently Asked Questions

The randomization engine uses a pseudo-random number generator (PRNG) to select indices from the internal databases of gradients, fonts, and quote arrays. It also applies stochastic variance to the font size and line height within a "safe range" (e.g., +/- 20%) to ensure the resulting design remains legible while looking unique.

While you can input custom dimensions, the presets are locked to industry standards (like 1080px or 1920px). These integers are optimized for the compression algorithms used by platforms like Instagram and LinkedIn. Using non-standard aspect ratios often results in automatic cropping or black bars being added by the hosting platform.

Yes. The Sticker system utilizes an event listener layer over the Canvas. When you click and drag a sticker, the JavaScript engine calculates the delta vector (change in position) of your mouse cursor and updates the internal coordinate state of the object, re-rendering the entire canvas frame-by-frame (typically at 60fps) to create the illusion of smooth motion.

Yes. If you select a transparent background or lower the opacity of the background layer to 0, the exported PNG will support the Alpha channel. This is useful for creating overlays, watermarks, or logos that need to be placed on top of other content later in video editors or other design software.

The tool uses the browser's `FileReader` API to read the binary data of your local image file. This data is converted into a base64 string or a Blob URL, which is then drawn onto the Canvas context. Since this happens locally in memory, large images may momentarily impact performance depending on your device's RAM.