How to Convert PNG to Vector in Adobe Illustrator CS5
Raster images like PNGs are made of pixels — fixed dots of color arranged in a grid. Scale one up too far and it blurs. Vector graphics, by contrast, are built from mathematical paths and shapes, meaning they scale to any size without losing sharpness. Converting a PNG to a vector in Illustrator CS5 is one of the most practical skills in the application, and the tool that makes it possible is called Live Trace.
What "Converting" a PNG to Vector Actually Means
It's worth being precise here: you're not flipping a switch. Illustrator CS5 analyzes the pixel data in your PNG and attempts to recreate it as a series of editable paths and anchor points. The result is a vector approximation — how close that approximation gets to the original depends heavily on the image itself and the settings you choose.
Simple logos, icons, and line art convert cleanly. Complex photographs with gradients, fine detail, and noise are much harder to faithfully reproduce as vectors.
Step-by-Step: Using Live Trace in Illustrator CS5
1. Place Your PNG into Illustrator
Open Illustrator CS5 and go to File > Place. Locate your PNG file and click Place. The image will appear on the artboard as a linked or embedded object. You'll see a bounding box with an X through it — this tells you it's a raster image, not yet a vector.
2. Select the Image
Click on the placed PNG to select it. You'll see the Live Trace button appear in the Control Panel at the top of the screen. This is the primary entry point for the conversion process.
3. Open Live Trace Options
Rather than clicking Live Trace directly (which applies default settings), click the small dropdown arrow next to the Live Trace button and choose Tracing Options. This opens the full settings dialog where you control exactly how the trace is performed.
Key settings to understand:
| Setting | What It Controls |
|---|---|
| Preset | A starting template (e.g., "Black and White Logo," "Color 6," "Technical Drawing") |
| Threshold | For black-and-white traces — how dark a pixel must be to become filled |
| Max Colors | Limits the number of colors used in the output vector |
| Min Area | Ignores tiny pixel clusters below a set pixel size — reduces noise |
| Path Fitting | Controls how tightly paths follow the original pixel edges |
| Blur | Pre-blurs the image before tracing to smooth out noise |
4. Choose a Preset That Matches Your Image Type
CS5 includes several built-in presets designed for different source material:
- Black and White Logo — best for simple two-tone artwork, icons, or silhouettes
- Sketched Art — good for hand-drawn line art scanned as PNG
- Color 6 / Color 16 — for flat-color illustrations with limited palette
- Photo (High Fidelity) — attempts to capture photographic detail, though output is complex and file sizes grow significantly
- Technical Drawing — useful for diagrams, schematics, or architectural line work
Start with a preset close to your image type, then adjust individual sliders as needed. Check Preview to see results in real time before committing.
5. Click Trace
Once your settings look right, click Trace. Illustrator processes the image and overlays a vector trace on top of the original raster. At this stage, the trace and the original PNG are still linked — you haven't fully converted yet.
6. Expand the Trace to Editable Paths 🎯
This step is critical. In the Control Panel, click Expand. This converts the Live Trace result into actual, editable vector paths you can manipulate with the direct selection tool, adjust colors on, or export cleanly.
After expanding, you'll likely have a group of paths. Right-click and choose Ungroup if you want to edit individual shapes separately.
7. Clean Up the Result
Even a good trace often needs manual cleanup:
- Delete the background if you don't need it (select it and hit Delete)
- Simplify paths via Object > Path > Simplify to reduce anchor point count and smooth curves
- Merge overlapping shapes using Pathfinder if needed
- Remove stray anchor points that add noise without contributing to the shape
Factors That Affect Trace Quality
The same process produces dramatically different results depending on several variables:
Source image quality matters most. A clean, high-contrast PNG on a white background traces far better than a screenshot, compressed JPEG saved as PNG, or an image with soft shadows and anti-aliasing.
Color complexity is the second major factor. A logo with three flat colors traces almost perfectly. A photograph of a face will generate thousands of fragmented paths that bear little resemblance to a clean vector illustration.
Original resolution also plays a role. A larger PNG gives Live Trace more pixel data to work with, which generally improves the accuracy of curved edges.
Your intended use shapes which settings matter most. A traced shape destined for a large-format print needs clean smooth paths. One being used as a web icon only needs to look right at small sizes, so aggressive Min Area settings that simplify the output may actually be preferable.
Black-and-White vs. Color Traces: A Different Workflow
For strictly black-and-white line art, the Threshold setting alone can produce excellent results quickly. For multi-color flat illustrations, bumping Max Colors and reducing Min Area tends to preserve more detail. For anything photographic, most professionals find that Live Trace in CS5 gets you partway there — but significant manual path editing or a different approach (like manual tracing with the Pen tool over the PNG as a template layer) produces more professional results.
What Happens to the File After Conversion
Once expanded, your artwork is a native Illustrator vector. You can save it as an .ai file, export as .svg for web use, or export as .eps or .pdf for print workflows. All of these formats preserve the vector data, meaning the image will scale cleanly at any size.
The quality of what you end up with — and whether it actually meets your needs — depends on the gap between the original image and the precision the trace can realistically achieve given those specific pixels.