Raster vs vector — what’s the difference? The two graphics formats that run every visual workflow.
Raster images are grids of pixels — fixed resolution, perfect for photographs, lossy when scaled. Vector images are mathematical paths — infinitely scalable, perfect for logos and production output, can’t represent photographic detail. Use raster for photos, screenshots, painterly art. Use vector for logos, icons, anything heading to a vinyl plotter, embroidery digitizer, screen-print press, or CNC table.
The core difference, in one paragraph
Raster images are made of pixels — small coloured squares laid out in a grid. The image 'is’ the pixel data. Vector images are made of paths — mathematical descriptions of points, curves, and fills. The image is the recipe to draw it, not the drawing itself. That single difference cascades into every other property they have.
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Side-by-side comparison
| Property | Raster | Vector |
|---|---|---|
| What it stores | Pixels (a grid of coloured squares) | Paths (math: points, curves, fills) |
| Scaling | Loses detail when enlarged (pixelation) | Infinite — sharp at any size |
| File size | Large (one entry per pixel) | Small (one entry per path) |
| Editing | Edit pixels — Photoshop, GIMP, Affinity Photo | Edit paths — Illustrator, Inkscape, Figma, Affinity Designer |
| Photographic detail | Excellent — millions of subtle tones | Poor — you’d need millions of paths |
| Logo / icon work | Locked-resolution output, bad for scaling | Production-ready, scales to any size |
| Print at any size | Needs source higher than print resolution | Print at any size from any source |
| Common formats | JPG, PNG, WebP, GIF, TIFF, PSD | SVG, AI, EPS, PDF, DXF |
| Typical use | Photographs, social media, screenshots | Logos, vinyl, embroidery, CNC, signage |
When raster is the right choice
- Photographs. Every photo is raster — pixels capturing what the camera sensor saw.
- Screenshots and screen captures.
- Painterly, textured, or impressionistic art where the goal is brush-stroke feel.
- Anything with photo-realistic gradients or millions of subtle tone variations.
- Quick web display where file size + load time outranks scalability.
When vector is the right choice
- Logos, wordmarks, icons, illustrations with flat colour areas.
- Anything heading to a vinyl plotter — closed cut paths required.
- Embroidery digitizing source — clean joins, no spurious nodes.
- Screen-print spot color separation work.
- CNC routing, laser cutting, plasma — closed-path DXF required.
- Engraving — single-stroke or outline-only paths.
- Channel letter / signage fabrication.
- Anything that needs to scale from business-card to billboard.
Why vector files are smaller (the math)
A 2000×2000 raster image stores 4 million pixels. Even at 8 bits per channel × 3 channels, that’s ~12 MB uncompressed. The same logo in vector might be 20–50 paths × a few control points each — a few KB total. Vector wins on size by 100×–1000× for logo-style art, every time.
Converting it yourself is fiddly. See where auto-trace breaks — free.
Our in-browser tracer shows the failure points; a human then redraws it clean and production-correct in 24 hours.
Need something custom? Email hello@vectorwiz.com
Scaling behaviour — the most visible difference
If you take a 200×200 raster logo and blow it up to 2000×2000, the browser or print software has to invent ~99% of the pixels via interpolation. The result is pixelation, blocky edges, blurry curves. The same logo in vector renders 2000×2000 just as sharp as 200×200, because the math is recomputed at the output size.
This is why production buyers care so much about getting vector source. A vinyl plotter cutting a 4-foot decal can’t do anything useful with a 300×300 raster logo — the cut path has to be drawn at the actual output size, which means starting from vector geometry, not pixels.
Converting between raster and vector
Vector → raster is trivial: every browser, print software, and image editor can rasterise a vector at any chosen output size. Raster → vector is the hard direction.
- For single-color, high-contrast logos: Adobe Illustrator’s Image Trace or Inkscape’s Trace Bitmap — fast but needs cleanup.
- For photographic source or stylised illustration: AI tools like Vectorizer.AI, vector.ai, Adobe Firefly — better quality than path-finding tracers.
- For production output (vinyl, embroidery, screen, CNC): hand rebuild by a designer. Auto-trace cleanup eats the same hours and produces worse files.
Deciding for a real job
- I’m posting on Instagram
- Raster. PNG or JPG. Vector formats don’t even render on social platforms.
- I’m printing a magazine ad
- Vector for the logo and type. Raster for the photo. PDF/X-4 with the right ICC profile bundles both for the press.
- I’m running a vinyl plotter
- Vector. AI, EPS, SVG, or DXF — closed paths required.
- I’m setting up an embroidery digitizer
- Vector source, stitch-friendly geometry. Hand-rebuilt vector beats auto-traced for digitizing quality.
- I’m laser-cutting acrylic
- Vector — closed-path DXF in AutoCAD 2000 dialect.
- I’m posting a wedding photo to a blog
- Raster. Lossy compressed JPG at 1200–1800 pixels wide. Vector would be huge and slow.
Frequently asked questions
What’s the simplest way to tell raster from vector?
Zoom in to 800%. Vector stays crisp and edges remain smooth; raster pixelates and shows the underlying pixel grid. Or open the file in Illustrator — if individual shapes are selectable as paths, it’s vector; if everything is one flat image, it’s raster.
Is PDF raster or vector?
Either. PDFs are containers that can hold vector paths, raster images, or both. A PDF exported from Illustrator is vector inside. A PDF that’s a scan or photograph is raster inside. Open in Illustrator or Acrobat Pro Output Preview to tell which you have.
Why do my logo printouts look pixelated even though they look fine on screen?
Screen resolution is typically 72–96 DPI; print is 300–600 DPI. A raster logo that looks sharp on a 72-DPI monitor at 200×200 will pixelate when printed at 600 DPI even at the same physical size. Either start with a higher-resolution raster (1200×1200+) or use vector, which has no resolution at all and renders sharp at any print size.
Can I convert a raster logo to vector myself?
Yes for simple, high-contrast logos — use Adobe Illustrator’s Image Trace or Inkscape’s Trace Bitmap. Expect to spend 30 minutes cleaning up auto-trace output before it’s production-ready. For multi-color logos, photographic source, or anything heading to vinyl/embroidery/screen-print/CNC, hand rebuild produces better results faster.
What file format should I send to a sign shop?
Vector — AI, EPS, SVG, or PDF (vector inside). Most sign shops can also work from a DXF for cutting tools. Avoid sending raster logos (PNG, JPG) for signage work — the shop will either redraw it (charging you) or auto-trace it (and get a worse result than a hand rebuild).
Does AI generate raster or vector images?
Most AI image generators (DALL-E, Midjourney, Stable Diffusion, Adobe Firefly Image) generate raster. AI vector generators (Vectorizer.AI, vector.ai, Recraft, Adobe Firefly Vector) generate vector by either training directly on vector data or converting raster intermediates to vector. The vector tools are newer (2022+) and improving fast.
Are SVG files always smaller than PNG?
For logos, icons, and flat-color illustrations: yes, often 10–100× smaller. For photographs or complex gradient art: no — SVG of a photo can be larger than the original PNG. Pick by content type, not by assumption.
Can I use vector and raster in the same design?
Yes — that’s how most professional design works. Vector for the logo, type, and clean illustrations; raster for photos and textured backgrounds. The container format (PDF/X-4 for print, PSD with smart objects, AI with embedded raster) holds both.
Naimur Rahman
Leads design direction and quality at VectorWiz. Reviews and redraws production artwork by hand across sign, screen-print, embroidery, and CNC work.
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