Logo blurry on your website? The 6 causes — and what really helps

Diagnosis first, then the fix

"Blurry logo" — unlike how it feels — has only a handful of possible causes. The fastest route to a diagnosis: view the logo on the live page with right-click → "Open image in new tab". If it's sharp there, the problem lies in the display (causes 4–6). If it's already blurry there, it lies in the file itself (causes 1–3).

Cause 1: raster image instead of vector

Symptom: the logo looks slightly soft at every size, staircased on slanted edges.
Background: a PNG or JPG has a fixed pixel count — every scaling recalculates pixels and costs sharpness. But a logo was almost always born as a vector graphic (Illustrator, Figma, Affinity), and in SVG format it stays mathematically sharp at every size.

Fix: request the SVG or AI/EPS file from the designer and embed the logo as SVG. Before embedding, run it through the SVG optimizer — export SVGs from design tools often contain ten times the unnecessary code. Why SVG almost always wins for logos and icons is covered in detail in SVG, PNG, or JPG for icons.

Cause 2: the retina trap — file too small for modern displays

Symptom: sharp on the older office monitor, soft on a MacBook, iPhone, and most current smartphones.
Background: high-DPI displays pack 2–3 device pixels into one CSS pixel. A logo displayed at 200 px wide needs an image file of 400–600 px — otherwise the display upscales, and upscaled means blurry.

Fix: if SVG isn't possible: export the PNG at double the display size (so a 400 px file for a 200 px display) and set it to the target size via CSS/attribute. The details with srcset are in Optimizing retina images.

Cause 3: JPG compression on hard edges

Symptom: a gray "dirt fringe" sits around letters and outlines, flat areas show cloud patterns.
Background: JPG is built for photos. Hard edges — exactly what logos are made of — produce the typical ringing artifacts, and every re-save amplifies them.

Fix: never save logos as JPG. PNG (lossless) or SVG. If only an artifact-ridden JPG remains, no filter helps — the logo has to be re-exported from the original template. With the converter you can at least stop further degradation (once to PNG, then never JPG again).

Cause 4: the browser scales — CSS size ≠ file size

Symptom: the file is sharp in a new tab, not on the page; the blur changes when zooming.
Background: if a 317 px wide PNG is squeezed via CSS to 200 px or 250 px, odd scaling factors arise — the browser distributes pixels onto half positions, and the result looks soft. Especially visible on thin lines and small type in the logo.

Fix: export the file width as a whole-number multiple of the display width (display 200 px → file exactly 400 px, not 317). To measure the actual display size: browser DevTools, inspect the element — render size and intrinsic size are listed right beneath each other.

Cause 5: the CMS compressed it too

Symptom: the uploaded file was flawless, the delivered one is smaller and softer.
Background:WordPress, Shopify & co. generate their own image sizes on upload and compress in the process — WordPress, for example, compresses JPGs to quality 82 by default and downscales very large images. Optimization plugins and CDNs (e.g. with automatic WebP conversion enabled) also intervene unasked.

Fix: exempt logos from auto-processing: in WordPress, upload the logo at exactly the needed size (then no scaling kicks in), put the file on the exception list in optimization plugins — or simply use SVG, which most pipelines leave untouched.

Cause 6: a transparency edge against the wrong background

Symptom: a light or dark fringe sits around the logo, especially in dark mode.
Background: this isn't blur but looks like it: the PNG's semi-transparent edge pixels were computed against white and now sit on a dark background — the white "halo".

Fix: re-export the PNG with clean transparency (cut out against transparent, not against white) — or serve a dedicated logo variant for dark mode. SVG bypasses this problem entirely too.

The short version as a decision aid

Conclusion in one sentence: for logos, SVG is the answer to five of the six problems — only the transparency edge occasionally needs a second look. If you only have the template as PNG: export generously large, keep it lossless, and scale to exact whole-number factors.

Sources

MDN — SVG · MDN — srcset · WordPress Developer — jpeg_quality.