What is zlib.dll?

The genuine zlib.dll file is a software component of zlib by zlib.
Zlib.dll is a DLL file (dynamic link library) associated with zlib, a software library used for data compression. DLL files store data, code and resources needed by one or more programs in order to function correctly. The first version of zlib made available to the public, version 0.9, was released on 1 May 1995. It was originally created to be used with the libpng image library (the official Portable Network Graphics (PNG) reference library). zlib is distributed as a free software, under the zlib license. zlib is a core part of numerous software platforms such as, Linux, Mac OS X, and iOS. The Sony PlayStation, Nintendo Wii, and Microsoft's Xbox have all made use of zlib. Zlib was written by Jean-Loup Gailly and Mark Adler.

zlib stands for zlib Data Compression Library

Zlib.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. You can fix your zlib.dll problem by downloading the correct zlib.dll file. The following information can help you determine if zlib.dll is a Windows system file or if it belongs to an application that you can trust.

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Zlib.dll file information

More precise details about what the zlib data compression library process belongs to are not available. This is partly because the author is not identified.

Description: Zlib.dll is not essential for the Windows OS and causes relatively few problems. Zlib.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 74,240 bytes (80% of all occurrences) or 53,248 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The file is a file with no information about its developer. The program has no visible window. The zlib.dll file is not a Windows core file. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. Therefore the technical security rating is 72% dangerous, however you should also read the user reviews.

Recommended: Identify zlib.dll related errors

Important: Some malware camouflages itself as zlib.dll. Therefore, you should check the zlib.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

This belongs to the zlib data compression library

Summary: Average user rating of zlib.dll: based on 1 vote with 1 user comment. One user thinks it's probably harmless.

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Best practices for resolving zlib issues

A clean and tidy computer is the key requirement for avoiding problems with zlib. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the zlib.dll process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

zlib.dll [all]