Logo PNG vs SVG vs AI: which format to choose?

Why the format of your logo is crucial

You have just received your brand new logo. The design is perfect, the colors are exactly what you wanted... but the file is called logo_final_v3.png and you wonder if it's enough. Spoiler: no, probably not.

The file format of your logo directly determines where and how you can use it. A logo in the wrong format means a blurry image on your business card, a too large file that slows down your site, or a printer who calls you back to ask for "a real file".

Understanding logo formats is not a designer's whim: it's a practical skill that will save you back and forth, additional costs and disappointing results. Let's see it together.

Matrix vs vector: the fundamental difference

Before diving into specific formats, you need to understand the most important distinction in digital imaging: raster (or bitmap/raster) vs. vector.

Raster images (bitmap)

A raster image is made up of pixels — small colored squares aligned in a grid. Each pixel has a specific color, and it is the whole that forms the image. The best known formats are PNG, JPG and WebP.

The problem? When you enlarge a raster image beyond its original resolution, pixels become visible. The image becomes blurry, jagged, pixelated. It's irreversible: you can't "invent" details that don't exist in the file.

Vector images

A vector image is made up of mathematical formulas which describe geometric shapes: Bézier curves, lines, anchor points. Vector formats include SVG, AI, EPS and PDF.

The major advantage? You can enlarge a vector file infinitely without any loss of quality. Whether your logo is 16 pixels wide (favicon) or 10 meters high (store sign), it remains perfectly clear. This is why every professional logo must exist in a vector version.

If you want to delve deeper into this subject, our complete guide to the vector logo explains in detail why it is essential.

The PNG format: the king of the web

The PNG (Portable Network Graphics) is probably the format you use most on a daily basis for your logo. And for good reason: it has undeniable qualities for digital.

The advantages of PNG

• Transparency: PNG manages a full alpha channel, which allows you to have a logo with a transparent background. Essential for placing your logo on any background.
• Lossless quality: unlike JPG which compresses (and degrades) the image, PNG uses lossless compression. Your logo remains clear, without artifacts.
• Universal compatibility: all browsers, all software, all platforms accept PNG. You can use it everywhere: website, social networks, documents, presentations…
• Precise colors: PNG supports up to 16 million colors (24 bits) and manages color profiles.

The limits of PNG

• Not resizable: it is a matrix format. If you have a PNG of 500×500 pixels and you have to print it on a 3 meter tarpaulin, the result will be catastrophic.
• File size: a high-resolution PNG can easily weigh several MB, which impacts the loading time of your site.
• Not editable: You cannot easily change the colors or proportions of a PNG logo. You have to go back to the source file.

When to use PNG?

PNG is perfect for fixed-size web and digital uses: profile photo on social networks, logo in an email, signature, office documents. Plan several variations (for example 200×200, 500×500 and 1000×1000 pixels) to cover different needs.

The SVG format: the vector of the web

The SVG (Scalable Vector Graphics) is the format that revolutionized the display of logos on the web. It is an open vector format, based on XML, and readable by all modern browsers.

The advantages of SVG

• Infinitely resizable: like any vector format, SVG adapts to all sizes without pixelation. On a Retina, 4K screen or a simple smartphone, your logo is always clear.
• Ultra light: an SVG logo generally weighs between 2 and 50 KB, compared to 100 KB to 1 MB for an equivalent PNG. This is a huge gain for web performance.
• Can be manipulated in CSS/JavaScript: you can change colors, add animations, hover effects, etc. The SVG is part of the DOM of the page, like HTML.
• Accessible: SVG supports title and desc attributes for referencing and accessibility (screen readers).
• Native responsive: an SVG automatically adapts to the size of its container. No need to provide 5 different sizes like with PNG.

The limits of SVG

• Not suitable for complex images: Photos, highly detailed illustrations or textures do not lend themselves to SVG format. As the number of shapes increases, the file grows.
• Requires vector software: To create or edit your own SVG, you need Illustrator, Figma, Inkscape or a similar tool.
• Typographic rendering: if the fonts are not vectorized (converted to curves), the text may be displayed differently depending on the systems.

When to use SVG?

In 2026, SVG is the recommended format for displaying a logo on a website. It is lighter, sharper and more flexible than PNG. If you have to choose just one format for the web, this is it.

AI format: the source file

The AI (.ai) is the native format of Adobe Illustrator, the reference software for creating logos and vector illustrations.

The advantages of AI

• Complete source file: the .ai contains everything: layers, editable paths, fonts, Pantone colors, effects. This is THE working file.
• Professional quality: This is the format that printers, agencies and graphic designers use on a daily basis. It allows you to modify and modify the logo endlessly.
• Universal export: from an .ai file, you can export to all other formats: SVG, PNG, PDF, EPS, JPG… This is the master file.

The limits of AI

• Owner: You need Adobe Illustrator (Creative Cloud subscription at ~24 €/month) to open and modify an .ai file. This is not an open format.
• Not directly displayable: impossible to put an .ai on a website or send it by email so that it is displayed. You have to export it first.
• Heavy: an .ai file can weigh several MB, or even tens of MB for complex projects.

When to use AI?

The .ai file is a working file to keep carefully. You will never use it directly to display your logo, but it will allow you to create all the variations you need. Always ask your graphic designer — it’s the key to your future autonomy.

The EPS format: universal compatibility

The EPS (Encapsulated PostScript) is an old vector format, still widely used in the printing world.

The advantages of EPS

• Maximum compatibility: EPS opens in Illustrator, CorelDRAW, Inkscape, Affinity Designer and many other software. It is the most universal vector interchange format.
• Printing standard: Almost all printers accept EPS. It is a proven and reliable format for print production.
• Vector: like SVG and AI, EPS can be resized without loss of quality.

The limits of EPS

• Aging format: Adobe has officially stopped development of the EPS format. It is gradually being replaced by PDF and SVG.
• No native transparency: Old versions of EPS do not support transparency. Recent files do this, but less reliably than SVG or PNG.
• Heavy: EPS files are often larger than SVGs for an equivalent result.

When to use EPS?

The EPS remains useful when you work with a service provider who uses software other than Illustrator, or when a printer specifically requests it. For recent creations, vector PDF tends to replace EPS in most professional workflows.

PDF format: the Swiss army knife

The PDF (Portable Document Format) is often underestimated as a logo format. However, a vector PDF is an excellent sharing format.

The advantages of PDF

• Universal: Anyone can open a PDF — no need for specialized software. The client, the printer, the web developer: everyone has access.
• Vector AND raster: a PDF can contain vector elements (and therefore be resizable) while integrating bitmap images if necessary.
• Quality printing: Professional printers commonly work in PDF/X, a certified standard for print production.
• Faithful preview: A PDF displays the same on all systems, unlike other formats which may vary.

The limits of PDF

• Not always vector: be careful, a PDF can contain a simple bitmap image. Just because it's a PDF doesn't mean it's vector. Check by zooming to 400%: if the logo remains sharp, it is definitely vector.
• Not ideal for the web: you do not integrate a PDF directly into a website. You must export in SVG or PNG.

When to use PDF?

Vector PDF is the best format for sharing your logo with someone who doesn't have design software. It is also an excellent format for archiving and transmission to printers.

Comparison table: what format for what use?

Criteria	PNG	SVG	AI	EPS	PDF
Type	Raster	Vector	Vector	Vector	Both
Resizable	❌ No	✅ Yes	✅ Yes	✅ Yes	✅ If vector
Transparency	✅ Yes	✅ Yes	✅ Yes	⚠️ Partial	✅ Yes
File weight	Medium-heavy	Very light	Heavy	Medium	Medium
Website	✅ Yes	✅✅ Ideal	❌ No	❌ No	❌ No
Social networks	✅✅ Ideal	⚠️ Depending on platform	❌ No	❌ No	❌ No
Printing	⚠️ So high resolution	⚠️ Depending on the printer	✅✅ Ideal	✅ Yes	✅✅ Ideal
Editable	❌ No	✅ With editor	✅✅ Complete	✅ Yes	✅ With editor
Software required	None	Browser/editor	Illustrator	Vector software	None (reading)

Which files to ask from your graphic designer?

When you have your logo created — whether by a freelance graphic designer, an agency or a service like Wilogo — here is the minimum kit to require:

The essential kit (vital minimum)

1. SVG — for your website and all digital uses
2. Transparent PNG (high resolution, minimum 2000×2000 px) — for social networks, documents, presentations
3. Vector PDF — for printing and sharing

The complete kit (recommended)

1. All the essential kit, plus:
2. AI or source file — for future modifications
3. EPS — if you work with traditional printers
4. PNG in several sizes — favicon (32×32, 180×180), social networks (800×800), high resolution (3000×3000)
5. Versions on white background and black background — to test readability
6. Monochrome version — black and white, for uses where color is not available (engraving, stamping, faxing, etc.)

At Wilogo, each logo created is delivered in SVG, PNG (several sizes) and vector PDF. Everything you need to get started with peace of mind.

To go further on managing your visual identity, consult our guide to the graphic charter.

Frequent errors to avoid

1. Use only PNG

This is the most common error. PNG is enough for everyday use, but without a vector file, you're stuck as soon as you have to enlarge your logo or send it to a printer. If your graphic designer only provides you with a PNG, immediately ask for vector sources.

2. Use a JPG for your logo

JPG does not manage transparency and compresses the image with loss. Each recording degrades the quality a little more. A JPG logo on a white background placed on a site with a colored background = an unsightly white rectangle. To be avoided.

3. Enlarge a raster file

"I'll just stretch the PNG" — no. Enlarging a raster file inevitably creates blur and artifacts. If you need a large size, start from the vector file.

4. Confusing bitmap PDF and vector PDF

A PDF is not automatically vector. If someone simply "printed" a PNG to PDF, the file still contains a bitmap image. Check by zooming in as much as possible: if it's blurry, it's not vector.

5. Lose source files

The .ai file is your life insurance graphic. Without it, any modification to your logo will require recreating it from scratch. Back it up to the cloud, to an external hard drive, wherever you keep your important documents.

To learn more about common pitfalls, take a look at our article on mistakes to avoid when creating your logo.

FAQ

What is the best format for a logo on a website?

The SVG is the ideal format for a website in 2026. It is vector (therefore perfectly sharp on all screens, including Retina and 4K), ultra light (a few KB), and can be manipulated in CSS. If your CMS does not support SVG, use a high resolution transparent PNG.

Can we convert a PNG to SVG?

Not directly with the same quality. There are automatic vectorization tools (Image Trace in Illustrator, Vectorizer.io, etc.) but the result is rarely as clean as a logo created natively in vector. Curves are rough and fine details are lost. It is always better to start from a vector source file.

Is the AI format essential if I have SVG?

SVG is sufficient for most purposes. However, the .ai file retains additional information: organized layers, Pantone colors, non-vectorized fonts, editable effects. If you plan to make significant changes to your logo in the future, the .ai file (or the source file of the software used) remains valuable.

What format to print your logo?

For professional printing, choose vector PDF or AI. The printer will thus be able to adapt the resolution and colorimetric profile (CMYK) to his equipment. As a last resort, a very high resolution PNG (300 dpi minimum at print size) may work, but it is not optimal.

How many logo formats should I have?

At least three: SVG (web), high-resolution transparent PNG (social networks and documents), and vector PDF (print and share). Ideally, add the source file (.ai or equivalent) and an EPS to cover all cases. At Wilogo, all these formats are included in delivery.