There is a free fully-functional 30-day trial version of WebLog Expert - IIS, Apache and Nginx log analyzer available. This program allows you to quickly and easily analyze your log files and get information about your site's visitors: activity statistics, what files visitors accessed, information about referring pages, search engines, browsers, operating systems, and more. You can download the program and test it for 30 days for free. The trial version doesn't have any limitations. The comparison chart below shows which features are available in different editions of WebLog Expert. | Feature | Enterprise | Professional | Standard | | | Analysis | | Unlimited profiles/sites | Yes | Yes | Yes | | Supports IIS, Apache and Nginx logs | Yes | Yes | Yes | | Automatically detects log format | Yes | Yes | Yes | | Can read GZ and ZIP compressed logs | Yes | Yes | Yes | | HTML reports (sample) | Yes | Yes | Yes | | Can download logs via FTP and HTTP | Yes | Yes | Yes | | Can upload reports via FTP | Yes | Yes | Yes | | Can send reports via e-mail | Yes | Yes | Yes | | Log analysis using multiple processors | Yes | Yes | Yes | | Caching analysis results | Yes | Yes | Yes | | Multithreaded DNS lookup | Yes | Yes | Yes | | Page title retrieval | Yes | Yes | Yes | | Custom time ranges in profiles | Yes | Yes | Yes | | Customizable report contents | Yes | Yes | Yes | | PDF reports (sample) | Yes | Yes | Yes | | CSV reports (sample) | Yes | Yes | Yes | | Custom output folder | Yes | Yes | Yes | | Date macros | Yes | Yes | Yes | | Command line mode | Yes | Yes | - | | Built-in scheduler | Yes | Yes | - | | Support for load balanced logs | Yes | Yes | - | | Built-in web server | Yes | - | - | | Dynamic HTML reports (sample) | Yes | - | - | | | Filters | | Hit filters | 19 | 19 | 19 | | Visitor filters | 5 | 5 | 5 | | | Reports | | Total number of tables | 74 | 74 | 73 | | Total number of charts | 92 | 92 | 90 | | Click overlay report | Yes | Yes | Yes | | Custom tables and charts | Yes | Yes | - | General Statistics | | Summary | Yes | Yes | Yes | Activity Statistics | | Daily | Yes | Yes | Yes | | By Hour of Day | Yes | Yes | Yes | | By Day of Week | Yes | Yes | Yes | | By Week | Yes | Yes | Yes | | By Month | Yes | Yes | Yes | Access Statistics | | Pages | Yes | Yes | Yes | | Files | Yes | Yes | Yes | | Images | Yes | Yes | Yes | | Others | Yes | Yes | Yes | | Directories | Yes | Yes | Yes | | Pages and Queries | Yes | Yes | Yes | | Pages per Visitor | Yes | Yes | Yes | | View Time | Yes | Yes | Yes | | Time Taken | Yes | Yes | Yes | | Entry Pages | Yes | Yes | Yes | | Exit Pages | Yes | Yes | Yes | | Bounces | Yes | Yes | Yes | | Paths Through Site | Yes | Yes | Yes | | File Types | Yes | Yes | Yes | | Virtual Domains | Yes | Yes | Yes | | Load Balanced Servers | Yes | Yes | - | Visitors | | Hosts | Yes | Yes | Yes | | Top-Level Domains | Yes | Yes | Yes | | Countries | Yes* | Yes* | Yes* | | US States | Yes* | Yes* | Yes* | | Cities | Yes* | Yes* | Yes* | | Authenticated Users | Yes | Yes | Yes | | Requests of Users | Yes | Yes | Yes | | Screen Resolutions | Yes** | Yes** | Yes** | | Color Depths | Yes** | Yes** | Yes** | | Languages | Yes** | Yes** | Yes** | Referrers | | Referring Sites | Yes | Yes | Yes | | Referring URLs | Yes | Yes | Yes | | Search Engines | Yes | Yes | Yes | | Engines and Phrases | Yes | Yes | Yes | | Search Phrases | Yes | Yes | Yes | | Search Keywords | Yes | Yes | Yes | | Entry Pages / Engines | Yes | Yes | Yes | | Entry Pages / Phrases | Yes | Yes | Yes | | Paths / Phrases | Yes | Yes | Yes | | Phrases / Entry Pages | Yes | Yes | Yes | Browsers | | Browsers | Yes | Yes | Yes | | IE and Edge Versions | Yes | Yes | Yes | | Firefox Versions | Yes | Yes | Yes | | Chrome Versions | Yes | Yes | Yes | | Opera Versions | Yes | Yes | Yes | | Browsers / Countries | Yes | Yes | Yes | | Operating Systems | Yes | Yes | Yes | | Browsers and OS | Yes | Yes | Yes | | Device Types | Yes | Yes | Yes | | Flash | Yes** | Yes** | Yes** | | Spiders | Yes | Yes | Yes | | Spidered Pages | Yes | Yes | Yes | | Spider Hosts | Yes | Yes | Yes | Errors | | Types | Yes | Yes | Yes | | Detailed 404 Errors | Yes | Yes | Yes | | Detailed Other Errors | Yes | Yes | Yes | | Status Codes | Yes | Yes | Yes | Goals | | Summary | Yes | Yes | Yes | | Conversion by Search Phrases | Yes | Yes | Yes | | Conversion by Referring URLs | Yes | Yes | Yes | | Conversion by Countries | Yes | Yes | Yes | Tracked Files | | Summary | Yes | Yes | Yes | | General Statistics for Tracked File | Yes | Yes | Yes | | Daily Activity for Tracked File | Yes | Yes | Yes | | Referrers of Tracked File | Yes | Yes | Yes | | Referrers of Visitors Who Accessed Tracked File | Yes | Yes | Yes | | Countries of Visitors Who Accessed Tracked File | Yes | Yes | Yes | | Hosts Accessed Tracked File | Yes | Yes | Yes | | Users Accessed Tracked File | Yes | Yes | Yes |
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* Requires installing a geolocation database
** Requires installing a special tracking code *** You can find additional information on the supported log formats on the following pages: IIS log analyzer, Apache log analyzer. | 
