Every brand requires its own dedicated scan software, and each one hides the "actually works" setting somewhere slightly different. HP's setup is below in full; find Canon, Epson, Brother, and Lexmark further down, plus what to do if scanning fails while printing works fine.
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Jump to your brand: HP · Canon · Epson · Brother · Lexmark
Other topics on this page: Prints fine but won't scan · Scanning from a computer (Windows/Mac) · Scanning multiple pages into one PDF · Scan-to-email and scan-to-folder
Install HP Smart. On Windows, get it from the Microsoft Store — search "HP Smart" (or just "HP") and install the one published by HP Inc. On Mac, it's in the Mac App Store under the same names. On mobile, it's in the App Store or Google Play. Avoid third-party download sites — go through the official store for your platform.
Sign in and add your printer. Open the app, sign in with an HP account (or create one — it's free and unlocks Scan to Computer along with a few other features), then tap the plus icon and Add Printer. The app scans your local network and should find your printer automatically if it's already on the same Wi-Fi.
The setting almost everyone misses — enable "Scan to Computer". Open your printer's tile in HP Smart, go to Preferences, then Manage Scan to Computer, and toggle it On. Without this enabled, the printer won't be able to send scans to that specific computer, even though everything else looks correctly connected. You can also check "Automatically start when I log on to Windows" here, so this stays active without needing to open the app every time.
Scan a document. Place your document face-down on the glass (or load it into the automatic document feeder, if your model has one). In HP Smart, tap the Scan tile, choose your source, color mode, resolution, and file type — PDF is the safest default for text documents. Tap Preview to check the crop and orientation before finalizing.
If scanning finds the printer but won't actually scan, double-check that Scan to Computer is genuinely toggled on in Preferences (it's easy to think you did this and actually didn't save it), and check that Windows Defender Firewall isn't blocking HP's background services — adding a firewall allow-rule for HP Smart resolves this in most cases.[1] On a Mac with the Scan option greyed out, this is a known issue after certain macOS updates — try removing and re-adding the printer in HP Smart, then check the app has Accessibility and Files & Folders permissions under Privacy & Security in System Settings.
Canon's scanning software is IJ Scan Utility, bundled inside the full driver package rather than downloaded separately — which is exactly why scanning stops working for people who only installed a "basic" driver. Go to Canon's official support site, search your exact model, and download the full driver and software package (sometimes labeled MP Drivers), not a "basic driver only" option if offered separately.[2] Canon runs two versions — the standard IJ Scan Utility for older models, and IJ Scan Utility Lite for current ones (leaning on AirPrint for simpler wireless scanning on Mac) — whichever your model supports installs automatically, no need to choose. Open it (Start menu on Windows, Applications on Mac) and confirm it finds your printer automatically if the driver installed correctly and the printer is on the same network; if it doesn't, the driver install likely didn't complete fully. Auto Scan mode detects whether you're scanning a photo, document, receipt, or business card and adjusts automatically; Document Scan mode gives manual control over resolution, color mode, and output format (PDF, JPG, PNG, TIFF). From your phone, the Canon PRINT app covers scanning directly from the printer over Wi-Fi with no computer software needed. If the utility can't find your printer, confirm you're not on a guest network, then reinstall the full driver package rather than reinstalling IJ Scan Utility alone — since it's bundled, a partial reinstall often doesn't fix a broken connection.
Epson splits scanning across two separate apps depending on the device. From a computer: install the full driver and utility package from Epson's official support site for your exact model — Epson Scan 2 is included.[3] Open it directly (Start menu on Windows, Applications on Mac); it should detect your printer automatically over Wi-Fi or USB. To scan: place your document on the glass or load the ADF, choose Home mode (simpler) or Professional mode (more control over resolution and color), select the source, and click Preview to check the crop before running the full scan — save as PDF for text, JPG for photos. From your phone or tablet: use Epson Smart Panel instead, a separate mobile app that needs no computer software — install it, let it detect your printer on the same Wi-Fi, and use its Scan tile directly. One thing worth knowing: Smart Panel only supports models on Epson's published compatibility list; if yours isn't listed, use Epson Scan 2 on a computer instead. If Epson Scan 2 doesn't detect the printer, reinstall the full driver and utility package together rather than Epson Scan 2 alone, since a partial reinstall usually doesn't fix detection failures.
Brother's scan app is iPrint&Scan, but on Windows it's a genuinely separate install from the driver package — you need both, in order, or scanning won't work even though printing does. Install the Full Driver & Software Package first from Brother's official support site for your exact model — this is a required first step, since iPrint&Scan alone won't work without it.[4] Then install iPrint&Scan separately (listed separately in the same downloads section on Windows, or directly from the App Store on Mac and mobile). Launch it and confirm it detects your printer automatically over Wi-Fi — if it doesn't, the driver package from step one most likely didn't install fully. If your printer and Android device both support NFC, tapping your phone against the printer's NFC mark connects instantly, skipping manual network setup entirely (iOS doesn't support this shortcut). Mac users who want to start a scan from the printer's own control-panel button, rather than opening the app first, need one more piece: the iPrint&Scan Push Scan Tool, installed separately alongside iPrint&Scan — without it, the scan button has nowhere on your Mac to send the file.
Lexmark's approach is genuinely different — there's no consumer-style mobile app pairing flow. Find your printer's IP address on its home screen (four numbers separated by periods, like 192.168.1.42). Download and run the ScanBack Utility from Lexmark's official downloads page (lexmark.com/downloads) — a genuinely separate Windows application from your regular driver.[5] Run it, click Setup, and enter the printer's IP address. Create a scan profile — choose document size, file format, and resolution, then name the profile (you may end up with more than one for different regular jobs), click Finish, and optionally "Create Shortcut" for desktop access. Here's the part that's different from every other brand: you don't start the scan from your computer. Load your document, then from the printer's own control panel go to Held Jobs > Profiles and Apps and select the profile you created — the finished file lands wherever you specified during setup. If you'd rather skip the ScanBack Utility, Windows' built-in Fax and Scan app can also communicate with a network-connected Lexmark printer once it's added under Printers & Scanners. If the printer isn't on Wi-Fi yet at all, try the WPS Push Button method first, or the Lexmark Mobile Assistant app for initial connection setup (not day-to-day scanning).
Printing and scanning are handled by separate software components inside the same printer, which is exactly why one can work perfectly while the other does nothing at all. The most likely cause: most manufacturers publish two driver packages — a "basic" or print-only driver, and a "full feature" package that adds scanning, ink monitoring, and maintenance tools. Auto-installers and some built-in OS driver detections often grab the smaller basic package by default, since it installs faster and is less likely to fail — printing works immediately, and scanning simply doesn't exist as an option anywhere. Reinstalling from the manufacturer's site and explicitly choosing the full package resolves this more often than anything else. Before troubleshooting further, confirm a scan app even exists on your system (Windows Fax and Scan, or your brand's utility; Image Capture or Preview's Import from Scanner on Mac) — if your printer doesn't appear as a scanner in any of these, the driver's scan component isn't installed.
On Windows specifically, a stuck background service called Windows Image Acquisition (WIA) handles scanning separately from printing — if it's stopped or hung, printing continues working while scanning fails silently or times out; search "Services," find "Windows Image Acquisition (WIA)," and restart it. Many Wi-Fi and network printers also ship with scan-to-computer turned off by default as a security measure — printing works over the network fine, but scan-to-computer needs explicit enabling through the manufacturer's utility software. Some firewalls and antivirus tools block scanning's specific network traffic while leaving print traffic untouched, since they use different protocols — temporarily disabling your firewall to test (then re-enabling and adding a specific exception) confirms whether this is the cause. Less commonly, the scanner hardware itself gets stuck reporting "busy" after an interrupted job (a power blip, a USB disconnect mid-scan); a full power-off for 30 seconds clears this in most cases.
Beyond each brand's own app, both operating systems have a generic path. On Windows, search "Windows Scan" in the Start menu, open it, select your printer from the dropdown if you have more than one, choose your scan settings, and click Scan — if your printer doesn't appear at all, the scanner driver component likely isn't installed (see above). On a Mac, open Image Capture (search with Spotlight) or use Preview's File → Import from Scanner, select your printer from the sidebar, adjust resolution and destination folder, and click Scan — if it doesn't appear, check System Settings → Printers & Scanners and confirm the scanner component shows as available; some printers need to be removed and re-added after a driver update for scanning to reappear. If printing works but scanning specifically fails, check you're not on a guest network or a different Wi-Fi band, since the two features use slightly different network discovery behavior. If computer-based scanning is giving you trouble, every major manufacturer's phone app can scan directly to your phone and share or save the file from there — a genuine workaround while you sort out the computer side, and for many people it ends up simply easier going forward.
By default, most scan apps save each page as a separate file — combining them takes one extra setting most people never notice. Look for "Save as single/multi-page file," "Combine into one file," or a "Continue scanning" checkbox after each page, usually in the app's scan settings or an advanced/options panel before you start; enable it, then scan each page in order. If your printer has an automatic document feeder, most scan apps automatically treat an ADF scan as one multi-page job rather than separate files, since the feeder is explicitly built for scanning stacks — load your pages in order, select the ADF as the scan source, and scan normally. If you already scanned each page as a separate file and don't want to redo it, you don't need to rescan: on Mac, open the files in Preview and drag each page's thumbnail into the sidebar of the first file to combine them; on Windows, a reputable free online PDF-merge tool accepts multiple files and combines them (avoid uploading anything sensitive to a site you don't recognize). If your scan app shows a preview or thumbnail strip after each page, check it before saving — it's much faster to rescan one crooked page immediately than to notice it after the whole file is merged. Pages coming out in the wrong order almost always means they went into the feeder in the wrong physical order to begin with, rather than a software issue; some scan apps do let you drag and reorder pages before final saving.
Many office and higher-end home printers can scan directly to an email address or a shared network folder without a computer needing to be involved in the transfer at all. This is configured through the printer's own web interface — accessible by typing its IP address into a browser — rather than through your computer's operating system, and it's worth setting up if you scan regularly and want to skip opening an app entirely.
Printing and scanning use separate services and protocols on every brand — that's why printing can work perfectly while scanning fails entirely, and why a firewall can block one without affecting the other.
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