Logo vectorization: why this is critical for scaling
Why PNG gets blurry, but vector stays sharp
A raster image is a grid of pixels of fixed size. A PNG logo that is 200 pixels wide has exactly 200 pixels and no more. When you stretch such a file to billboard size, the program is forced to 'invent' new pixels between existing ones — interpolate. The result is blurred edges, stair-step lines on diagonals, and loss of sharpness in small details like font notches.
Vector does not 'invent' anything. It stores not pixel colors, but a mathematical path — coordinates of anchor points and curves between them. When the logo is enlarged, the system recalculates the same formulas for the new scale, and the line remains perfectly smooth, whether on a smartphone screen or projected on a skyscraper. Technically, it is the same file — just rendered for different output resolutions.
Which vector format to choose for the task
The mistake of many companies is exporting the logo 'for all occasions' in one file and then struggling with incompatibility. Every format has its own area of application, and mixing them up means planting problems for future printing or website layout.
| Format | Where to apply | Key setting |
|---|---|---|
| SVG | Websites, applications, presentations | Convert text to outlines — otherwise the font will 'go astray' without the required font file on the device |
| EPS | Print, typography | CMYK color profile, resolution 300 dpi |
| PDF/X-4 | Printing and transferring to the printing house | Preserves transparency and fonts without rasterization |
| AI | Internal designer work, editing | Working file with layers — not for transfer to contractors without export |
The practical conclusion is simple: for a website, SVG is needed; for typography — EPS or PDF/X-4; for further design refinement by a designer — AI. If a brand book contains only one of these files, it is considered incomplete.
How to check that what you have is a real vector and not a renamed raster
A common situation: a contractor sends a file with the extension .ai or .eps, but inside it is a regular raster image, simply wrapped in a vector container. It is impossible to distinguish visually until you start scaling.
- Increase the zoom in the editor up to 1000% — the contours of a real vector remain smooth, while hidden raster will show pixelated 'stairs'.
- Open the file in Photoshop — if the program suggests rasterizing the image upon opening, then there is no vector or it is embedded as an image inside the file.
- Check the file size: a real vector logo usually takes up kilobytes, not megabytes — a large weight almost always indicates an embedded raster layer.
- Load the SVG into a browser and try to select elements via the code inspector — if path tags and coordinates are visible, the file is honest.
Can a ready raster logo be converted to vector
Technically — yes, this is called tracing (trace). Automatic tools like Image Trace in Illustrator handle simple flat shapes well: clear lines, limited palette, without complex transitions.
But with gradients, soft shadows, and photorealistic elements, automation handles poorly — the program either chops the smooth transition into rough bands, or creates hundreds of extra nodes, which makes the file heavy and 'shaky' at bends. In such cases, the only viable option is manual redraw of the contours by a designer, while simultaneously simplifying complex elements. This is not a five-minute job, but a separate task that should be budgeted for in a rebranding project, rather than relying on free auto-tracing.
Minimum logo size and where these figures came from
The size limitation is not about the vector itself, which scales losslessly, but about the human eye and the physics of printing. Even an ideal vector on souvenirs sized just a few millimeters becomes an unreadable blob if the fine details of the logo physically cannot fit into the allocated space.
Hence the practical rule: 5 mm in width is a critical limitation for embroidery, where letters begin to lose their shape; for printing on souvenirs, 40–50 mm is recommended for offset printing and 50–70 mm for screen printing — this ensures legibility. For a document of A4 format, the logo must be large enough for its details to be distinguishable; the exact value depends on the logo's complexity and output method, everything else scales proportionally from this point without distorting the aspect ratio. If the brand book contains a logo with small typography or thin details, a simplified version should be kept for small media — a compact symbol without the text block.
What breaks during incorrect vectorization — and at what cost to the business
Formally, a 'vector' file can be corrupted internally, and this is the most underestimated issue in the topic. A logo with a raster image embedded inside a vector container — a classic case: the file opens externally as AI, but during printing in a print shop, pixels suddenly appear where they are not expected. The reason is that the designer inserted a raster texture or shadow into the vector and did not notice, or exported it using the wrong tool.
The second common problem is that the color is not converted to CMYK before sending to print. A logo made in RGB for screen changes hue when printed: bright blue turns into a dull gray-blue because the printer physically cannot reproduce all RGB hues with CMYK inks.
This reflects directly on business processes and is not harmless:
- The layout goes to the printer, the run is printed, and only the finished product shows the color distortion — the reprinting run is at the company's expense.
- The designer on outsource receives a 'vector' with embedded raster, wastes time unpacking and redoing instead of simply adapting to the task.
- A logo for different media — from packaging to outdoor advertising — is assembled manually each time, because the source file does not fit any export standard.
Here, savings are measured not in theory but in the number of hours of the designer and the cost of rescheduling. One correctly assembled set of files — SVG for the web with outlined fonts, PDF/X-4 or CMYK-EPS at 300 dpi for printing — solves the issue for years to come. That is exactly why vector verification should be done once when receiving the logo from the designer, and not every time a new printing task arises.
Why PNG gets blurry, but vector stays sharp
A raster image is a grid of pixels of fixed size. A PNG logo that is 200 pixels wide has exactly 200 pixels and no more. When you stretch such a file to billboard size, the program is forced to 'invent' new pixels between existing ones — interpolate. The result is blurred edges, stair-step lines on diagonals, and loss of sharpness in small details like font notches.
Vector does not 'invent' anything. It stores not pixel colors, but a mathematical path — coordinates of anchor points and curves between them. When the logo is enlarged, the system recalculates the same formulas for the new scale, and the line remains perfectly smooth, whether on a smartphone screen or projected on a skyscraper. Technically, it is the same file — just rendered for different output resolutions.
Which vector format to choose for the task
The mistake of many companies is exporting the logo 'for all occasions' in one file and then struggling with incompatibility. Every format has its own area of application, and mixing them up means planting problems for future printing or website layout.
| Format | Where to apply | Key setting |
|---|---|---|
| SVG | Websites, applications, presentations | Convert text to outlines — otherwise the font will 'go astray' without the required font file on the device |
| EPS | Print, typography | CMYK color profile, resolution 300 dpi |
| PDF/X-4 | Printing and transferring to the printing house | Preserves transparency and fonts without rasterization |
| AI | Internal designer work, editing | Working file with layers — not for transfer to contractors without export |
The practical conclusion is simple: for a website, SVG is needed; for typography — EPS or PDF/X-4; for further design refinement by a designer — AI. If a brand book contains only one of these files, it is considered incomplete.
How to check that what you have is a real vector and not a renamed raster
A common situation: a contractor sends a file with the extension .ai or .eps, but inside it is a regular raster image, simply wrapped in a vector container. It is impossible to distinguish visually until you start scaling.
- Increase the zoom in the editor up to 1000% — the contours of a real vector remain smooth, while hidden raster will show pixelated 'stairs'.
- Open the file in Photoshop — if the program suggests rasterizing the image upon opening, then there is no vector or it is embedded as an image inside the file.
- Check the file size: a real vector logo usually takes up kilobytes, not megabytes — a large weight almost always indicates an embedded raster layer.
- Load the SVG into a browser and try to select elements via the code inspector — if path tags and coordinates are visible, the file is honest.
Can a ready raster logo be converted to vector
Technically — yes, this is called tracing (trace). Automatic tools like Image Trace in Illustrator handle simple flat shapes well: clear lines, limited palette, without complex transitions.
But with gradients, soft shadows, and photorealistic elements, automation handles poorly — the program either chops the smooth transition into rough bands, or creates hundreds of extra nodes, which makes the file heavy and 'shaky' at bends. In such cases, the only viable option is manual redraw of the contours by a designer, while simultaneously simplifying complex elements. This is not a five-minute job, but a separate task that should be budgeted for in a rebranding project, rather than relying on free auto-tracing.
Minimum logo size and where these figures came from
The size limitation is not about the vector itself, which scales losslessly, but about the human eye and the physics of printing. Even an ideal vector on souvenirs sized just a few millimeters becomes an unreadable blob if the fine details of the logo physically cannot fit into the allocated space.
Hence the practical rule: 5 mm in width is a critical limitation for embroidery, where letters begin to lose their shape; for printing on souvenirs, 40–50 mm is recommended for offset printing and 50–70 mm for screen printing — this ensures legibility. For a document of A4 format, the logo must be large enough for its details to be distinguishable; the exact value depends on the logo's complexity and output method, everything else scales proportionally from this point without distorting the aspect ratio. If the brand book contains a logo with small typography or thin details, a simplified version should be kept for small media — a compact symbol without the text block.
What breaks during incorrect vectorization — and at what cost to the business
Formally, a 'vector' file can be corrupted internally, and this is the most underestimated issue in the topic. A logo with a raster image embedded inside a vector container — a classic case: the file opens externally as AI, but during printing in a print shop, pixels suddenly appear where they are not expected. The reason is that the designer inserted a raster texture or shadow into the vector and did not notice, or exported it using the wrong tool.
The second common problem is that the color is not converted to CMYK before sending to print. A logo made in RGB for screen changes hue when printed: bright blue turns into a dull gray-blue because the printer physically cannot reproduce all RGB hues with CMYK inks.
This reflects directly on business processes and is not harmless:
- The layout goes to the printer, the run is printed, and only the finished product shows the color distortion — the reprinting run is at the company's expense.
- The designer on outsource receives a 'vector' with embedded raster, wastes time unpacking and redoing instead of simply adapting to the task.
- A logo for different media — from packaging to outdoor advertising — is assembled manually each time, because the source file does not fit any export standard.
Here, savings are measured not in theory but in the number of hours of the designer and the cost of rescheduling. One correctly assembled set of files — SVG for the web with outlined fonts, PDF/X-4 or CMYK-EPS at 300 dpi for printing — solves the issue for years to come. That is exactly why vector verification should be done once when receiving the logo from the designer, and not every time a new printing task arises.
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