What converting a PNG to vector means, and when you need it

Converting a PNG to vector means turning a raster image — made of pixels arranged in a grid — into a vector image made of mathematical paths and shapes. In Illustrator CS5, this process is called image tracing. The result is a file that scales to any size without losing sharpness, whereas a PNG gets blurry when you enlarge it.

You need this when you have a logo, icon, or straightforward graphic as a PNG and want to edit it in Illustrator, print it large, or use it across different sizes. A photograph or complex gradient image usually should stay raster — converting it to vector produces a clunky, oversimplified result. straightforward graphics with solid colors and clear edges convert cleanly.

Illustrator CS5 does not have the automatic Live Trace feature that newer versions have. Instead, you will use the manual tracing tools or import the PNG and trace over it by hand. Both methods work; the choice depends on how precise you need the result and how much time you want to spend.

Key Takeaways

  • PNG files are raster images made of pixels; vector images are made of mathematical paths that scale without losing quality.
  • Illustrator CS5 requires manual tracing or the Trace tool, not the automatic Live Trace found in newer versions.
  • straightforward graphics with solid colors and clear edges convert to vector cleanly; photographs and complex gradients do not.
  • The fastest method is to place the PNG, use the Trace tool, and adjust the threshold until the outline matches the original.
  • After tracing, you can edit the vector paths, change colors, and scale the image to any size without pixelation.

Setting up your PNG file and opening Illustrator CS5

Open Illustrator CS5 and create a new document. Go to File > New and choose your document size. For a logo or icon, 800 by 800 pixels works well as a starting point.

Place your PNG file into the document. Go to File > Place, navigate to your PNG, and click Place. The image will appear in your document. You can resize it by dragging a corner handle while holding Shift to keep the proportions locked. Position it where you have room to work around it.

Make sure the PNG is selected (you will see the selection box around it). If it is not, click it once. The PNG needs to be selected before you can trace it.

Using the Trace tool to convert the PNG

With the PNG selected, go to Object > Trace > Trace. A dialog box opens with several options. The most important is Threshold, which controls how much detail the trace captures. A lower threshold (around 50–100) keeps more detail; a higher threshold (150–200) simplifies the image and removes small marks.

Start with a threshold around 100 and click Trace. Illustrator will convert the PNG into vector paths. The result appears on top of the original PNG. If the outline looks too rough or too detailed, undo (Ctrl+Z or Cmd+Z), adjust the threshold, and trace again.

Once the trace looks right, you can delete the original PNG underneath. Click the traced vector to select it, then click the original PNG below it while holding Shift to select both. Press Delete to remove the PNG, leaving only the vector version.

Manual tracing when the Trace tool does not work well

If the Trace tool produces a result that is too rough or misses important details, you can trace the PNG by hand using Illustrator's drawing tools. This takes longer but gives you complete control.

Place the PNG as described above, then reduce its opacity so you can see through it. Select the PNG and go to the Transparency panel (Window > Transparency if it is not visible). Lower the Opacity slider to around 50 percent.

Now use the Pen tool (press P) to draw paths over the PNG outline. Click once to place a point, then click again to create a straight line between points. To create curves, click and drag to pull out handles that shape the curve. This method is slow but produces clean, editable paths. Once you finish tracing all the outlines, delete the PNG and you are left with pure vector art.

Cleaning up and editing your vector

After tracing, your vector may have rough edges, extra points, or stray paths. Select the vector and go to Object > Path > Simplify. This removes unnecessary points and smooths the paths. A dialog appears; the default settings usually work well. Click OK.

If you see small stray marks or dots, select them individually and delete them. Use the Selection tool (press V) to click and select, or use the Direct Selection tool (press A) to select and adjust individual points.

Now you can change colors. Select the vector, then click a color in the color panel or use the fill and stroke controls at the bottom of the toolbar. You can also add a stroke (outline) by clicking the stroke color box and choosing a color and weight.

Saving your vector file

Save your work as an Illustrator file so you can edit it later. Go to File > Save As, choose a name, and make sure the format is set to Adobe Illustrator (.ai). Click Save.

If you need to use the vector in other programs, export it as a PDF or SVG. Go to File > Export, choose your format, and click Export. PDF works in almost any design or print program; SVG is best for web use because it stays sharp at any size and has a small file size.

Do not save over your original PNG file. Keep both versions — the PNG as a backup and the AI file as your editable vector.

When to trace by hand instead of using the tool

The Trace tool works best on straightforward graphics with clear edges and solid colors. If your PNG is a photograph, has gradients, or has very fine details, the Trace tool will either oversimplify it or create a messy result with too many paths.

Hand tracing is better for logos, icons, and line drawings where you want clean, straightforward paths. It also works when you want to redraw the image slightly differently than the original — for instance, smoothing rough edges or removing small details that do not matter.

If you are converting a complex image and the Trace tool result is unusable, consider whether you actually need a vector version. A high-resolution PNG often works fine for screen use. Vector conversion is most useful when you need to scale the image large, edit it in Illustrator, or reduce file size for web use.

Frequently Asked Questions

Can I convert a JPEG the same way as a PNG?

Yes. Place the JPEG into Illustrator the same way you would a PNG, then use the Trace tool or trace by hand. JPEG files often have more compression artifacts (blurry edges, color noise), so the Trace tool may produce rougher results. A PNG with a transparent background usually traces more cleanly than a JPEG.

Why does my traced vector look blocky or pixelated?

The threshold is set too high, which means Illustrator is simplifying the image too much. Undo the trace, lower the threshold value, and trace again. Start at 50 and work up until the result looks right. You may need to try several times to find the sweet spot.

Can I edit the paths after tracing?

Yes. Use the Direct Selection tool (press A) to click on individual points and drag them to new positions. You can also add new points by clicking on a path with the Pen tool, or delete points by selecting them and pressing Delete. This is how you refine and clean up a traced vector.

What is the difference between saving as AI and exporting as PDF?

AI is Illustrator's native format and preserves all layers, text, and editable paths. PDF is a fixed format that locks the design but works in almost any program. Save as AI if you might edit the file later; export as PDF if you are sending it to a printer or sharing it with someone who does not use Illustrator.

Does Illustrator CS5 have Live Trace like newer versions?

No. CS5 has the Trace tool under Object > Trace, which works similarly but requires more manual adjustment. Newer versions have Live Trace, which updates automatically as you change settings. The CS5 method is slower but produces the same final result.