Why is my logo blurry?

18 October 2026 · Pathside guides

Pathside opens .ai, .eps, .svg and PDF on the phone →

First, work out which kind of file you are looking at

There are only two kinds, and they fail in completely different ways. A raster file — PNG, JPG, GIF, a screenshot — is a fixed grid of coloured squares. A vector file — .ai, .svg, and most .pdf artwork — stores the shapes as maths and redraws them at whatever size is asked for.

So the test is simply to zoom in, hard. A vector logo stays crisp as far in as you can go; the edge of a curve is still a clean edge at ten times the size. A raster logo breaks up into blocks at a predictable point, and no setting anywhere fixes it. If you are unsure what you have, how to tell if a file is vector walks through the zoom test and two others, including why the extension on the end of the name is not evidence.

One warning on the zoom test: do it in something that draws the file itself. Several phone and web viewers render artwork on a server and hand back a compressed picture of it, so everything looks soft at high zoom and the test tells you nothing about your file.

The four causes, in the order they usually happen

1. The artwork was flattened to pixels once, at one size. Somebody exported the logo for a particular job — a web header, a slide — and that export is what has been circulating ever since. Enlarging it cannot add detail that was never recorded; it only makes each pixel bigger. It is the point made over and over on Adobe's own user forums about PNG files, and it is the most common cause of a blurry logo by a wide margin.
2. The slot it sits in is bigger than the file. A website theme, a slide master or a document template will happily scale a 150-pixel logo up to fill a 400-pixel space. Worse, most phones and laptops now have high-density screens that use roughly two physical pixels per layout pixel, so a logo that exactly fits its slot on paper is still being doubled on screen. That is why the same file can look fine on one monitor and soft on a newer laptop.
3. It has been saved as a JPG, probably more than once. JPG throws information away to get the file small, and it throws most of it away at hard edges between flat colours — which is the whole of a typical logo. Every re-save compounds the last one, so a logo that has been through a few emails and a few “save as” steps arrives with soft, slightly mottled edges even at its original size. For anything with a crisp edge or a transparent background, PNG or PDF is the right thing to send.
4. What you have is not really the logo. It is a screenshot of a website, an image lifted from an email signature, or a thumbnail saved out of a chat app. All three are small by construction, and often resized twice on the way to you. A file only a few tens of kilobytes in size is a strong hint that this is what happened.

Does renaming it to .pdf or .svg fix it?

No, and it is worth understanding why, because the suggestion comes up constantly. The extension only decides which program your system hands the file to. It changes nothing inside, so a PNG renamed to .svg is a PNG that now fails to open. Placing that same PNG inside a PDF does not help either: the PDF is a wrapper around the same pixels, and it will blur at exactly the same point.

Turning pixels back into shapes is real work, called tracing or redrawing, and it is a design job rather than a file operation. Automatic tracers do a decent job on flat, simple marks and a poor one on gradients, fine lettering and anything hand-drawn. The honest order is: find the vector original first, and only pay for a redraw when it genuinely no longer exists.

How many pixels does it actually need?

If a raster file is all you will ever have, it can still be perfectly sharp — it just has to be big enough for where it is going. Two rules cover almost every case:

• On a screen: the width of the space, doubled. A 200-pixel header slot wants a 400-pixel file.
• In print: the printed width in inches × 300. A logo two inches wide on a flyer wants 600 pixels; four inches wants 1,200.
• Anything large-format: twelve inches at 300 dpi is 3,600 pixels, and at that size you should be sending the vector file and letting the printer scale it.

Those are the same two sums as what size to export a logo at, which has more slots worked out, and the reason “as big as possible” is the wrong answer.

Can a blurry logo be sharpened?

Not in the way people hope. Sharpening filters raise the contrast at edges that are already there; they cannot recover an edge the file never held. Modern upscalers do better, but what they are doing is inventing plausible pixels, which on type and on a precise geometric mark is exactly where invention shows. You may get something passable for a small web use. You will not get artwork you would put on a sign.

The reliable fix is upstream. Whoever drew the logo has the vector file, and exporting a fresh copy at the size you need takes them under a minute.

What to ask for, in one message

Ask for the vector artwork — the .ai, .pdf or .svg — and say what it is for. If they can only send a raster, give them the pixel number from the sums above rather than the word “high-resolution”, which means nothing in particular and gets you whatever they had open. If a printer or sign maker is waiting on you, how to send a logo to a printer covers what to attach and what to write.

Checking the file you were sent, on a phone

The awkward case is the one where the file arrives in a chat or an email, there is no desktop in reach, and you need to know whether what you have is any good before you forward it. That is what Pathside is for. It opens .ai, .pdf, .svg and .svgz on the phone itself, and an .eps when that file carries a PDF inside it. It decides what a file is by reading its first bytes rather than trusting its name, and it redraws the artwork from the vector at the zoom your pinch comes to rest on, rather than stretching a picture of it — the app's own first screen puts it as “open the artwork, not a picture of it”.

It also answers this question by refusing. Hand it a PNG or a JPG and it says the file is not artwork, whatever the name on the end of it claims. A CorelDRAW or a Photoshop file gets named outright, because those are not drawn here either. That refusal is the diagnosis: if the thing you were sent is not one of those four formats, no amount of zooming is going to make it sharp.

Opening, zooming and stepping through artboards are free. Exporting is a one-time unlock — a PNG or JPG at 1024, 2048 or 4096 pixels on the long edge, with the exact dimensions shown before you save, or a one-page PDF, one page at a time — which is how you get a correctly sized raster copy out of a vector file without a desktop. Turning an AI file into a PNG on your phone goes through that step by step, and checking a logo before it goes to print covers the other four things that go wrong between approval and the press. Nothing you open is sent anywhere, and the whole thing works in aeroplane mode.