World of Logs combat log analyzer allows gamers to save, share and analyze their raiding experiences conveniently and thoroughly in the Blizzard MMO World of Warcraft. If you're new here, make sure you check out the tour for a 1 minute introduction. If you have any questions, we're happy to answer them on the forums.

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Last uploaded reports
Icecrown 25N 1h 15m live
Icecrown 25N 2h 46m
Ulduar 25N 5h 38m
Icecrown 25N 6h 20m
Ruby Sanctum 10N 6h 27m
Icecrown 25N 6h 42m live
Ulduar 10N 6h 43m
Icecrown 25N 6h 50m
Icecrown 25N 6h 56m
Icecrown 25N 6h 58m
Naxxramas 10N 6h 58m live
Naxxramas 25N 6h 58m live
Icecrown 25N 7h 4m live
Icecrown 10N 7h 6m
Naxxramas 10N 7h 10m
Icecrown 25N 7h 16m live
Icecrown 25N 7h 24m live
Icecrown 25N 7h 24m live
Ulduar 25N 7h 38m
Icecrown 25N 7h 45m

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Welcome to World of Logs

World of Logs combat log analyzer allows gamers to save, share and analyze their raiding experiences conveniently and thoroughly in World of Warcraft. If you're new here, make sure you check out the tour for a 1 minute introduction. If you have any questions, we're happy to answer them on the forums.

To create an account, simply register and either create your own guild or join one by browsing to it on the realms page.

Welcome to Legion

Posted by Miles on 28 Sep 2016 16:21 CEST

Welcome to the new expansion! We're still updating the site, let me know if I missed anything important. The fastest way is by dropping me an email at

Here's a change log of so far:

  • Workaround bugged data: heal + absorbed event for -2^31 HP in the log was causing negative healing totals.
  • Added class and spec detection for Demon Hunters
  • Updated spec detection for Bear druids, Blood Death Knights, Discipline Priests and Survival Hunters.
  • Fixed the client for the new COMBATANT_INFO line causing an overflow, too many commas.
  • Fixed the guild leader verification tool, it used an ancient version of the community API that stopped working.


Posted by Miles on 20 Mar 2015 11:50 CET

As you've probably noticed, tactical overview pages for all bosses in the current raid tier have been added a while ago. Nothing new to see for now, but there are a few things work in progress to make your raiding easier.

Latest changes (18/12)

Posted by Miles on 18 Dec 2014 20:50 CET

Nothing much to see today, so here's a small dump from the commit logs for the last 2 days

  • (Old) guild's rankings page stray colspan removed.
  • Fixed ?type=json option on rankings pages, data was incomplete. And now you know it exists.
  • Updated guild reports data feed (/feeds/guilds/[id]/raids), they were forgotten in the big rip-and-replace change for internal database models. And now you know it exists. Add ?t=plain/xml/json for variants.
  • Changed global backend timeout to individual ones, customized settings to allow larger logs to update more smoothly.
  • Found 2 hotspots in backend during profiling:
    • Improved BitArray concatenation performance, reduced overhead of loading a report. (+15% faster load time)
    • Improved player-pet merging performance, moved more work out of the inner loop. (+15% faster load time)
    • -> more CPU time budget for new stuff. Yay! Not that we're CPU constrained at all, very overprovisioned at the moment - but while you can buy throughput (more pages/sec), you can't improve latency with money (the time it takes to render 1 page)

Last 2 bosses added to Tactical Overview

Posted by Miles on 16 Dec 2014 16:48 CET

Brackenspore and Twin Ogron have been added to the Tactical Overview, and the page itself has been changed a bit.

  • Added hover on aura graphs to show who's datapoint it is - must have for crowded graphs.
  • Added auto-coloring so 4 Druids won't have the same color

And I'm off to the next feature to code. Ideas? Write me at or post on the forums.

Oh yea, I've received a poke about Stagger. It's been on the todo list for ages, but as it's a really annoying ability to track, so far prototypes aren't working out so well. Got an idea? Poke me.

Ko'gath added

Posted by Miles on 12 Dec 2014 18:29 CET

Ko'ragh <Breaker of Magic> has been added to the Tactical Overview, with support for showing the Nullification Barrier status, stacks of Breaker's Strength, Overflowing Energy handling, Destabilize (adds) handling and the Expel Magics.

If you have an idea for something to add, let us know and we'll try to have it added before the next raid.

Introducing the Tactical Overview

Posted by Miles on 11 Dec 2014 20:12 CET

This basically:

One of the backend changes we've made recently is to make it so anything can be graphed, and quickly. This means that we can now plot everything for a boss on a big tactical overview page. As a bit of a tech demo, we've added configurations for 4 of the Highmaul bosses, including Imperator Mar'gok, so you can take a look at what's possible. Here's a quick tour of the main features:

Stacks and damage graphs. This shows how well your tanks are switching to keep the stacking dots healable.

Raid wide debuffs. In this case - silly people stood in the cleave too long and all died at stack 6. Don't do this.

Mines on Mar'gok. Shows who stepped onto one.

Avoidable damage. Player on the top right "wins" (data summed per player). This one is configured to exclude the first unavoidable random hit and only show people failing at moving.

Obviously there are a billion other combinations you can plot, but this will do as a start - later on, you'll be able to customize everything and share your dashboards with other people. It's not only handy for verifying execution of boss tactics, something like compare spell rotations between players should be doable too.

New guild pages

Posted by Miles on 28 Nov 2014 15:30 CET

The new guild pages for linked guilds are almost pretty much functional now; on the new site, you can change a few blocks of information to describe your guild, your recruitment status and how to apply. We're also working on custom guild cover images, here's a little preview of how yours can look like.

Recent changes -, logging and difficulty detection

Posted by Miles on 28 Nov 2014 14:32 CET

We've been hard at work to update World of Logs for the new expansion pack and add a few major features. The new raid instances and dungeons have been added, of course, but that's not all.

The biggest change is how we handle guilds, realms and authentication. When it's completed, the preferred way to login is to do so with a account. Doing so will retrieve your guilds and characters from WoW from Blizzard and you won't have to "create" a guild on WoL anymore and handle members and permissions yourself. Details of this change can be found on the help pages. Please feel free to take a look and send us feedback and feature requests.

There are still a few things that don't work for guilds yet, most notable, subscriptions. You can continue to login and use the old system for now, there will be an option to transfer all your reports and subscription to the new system when it's ready.

A second one is the support for advanced combat logging format in the backend. For now, it's an invisible change, used only for verification. We've a few things planned for this data, check back in a few weeks for more information.

Oh, and encounter detection has been updated. Once upon a time, WoW doesn't write any information about encounters to the combat log and the only way to guess what difficulty you're playing on is to look at the data. If the Lich King summons Shadow Traps, it's probably heroic; for bosses like these, it's easy, but there were tons of exceptions that don't have additional spells and required special handling. Now it's a lot easier with an ENCOUNTER_START event; support has been added and all existing reports' difficulties have been updated if it's uploaded with a recent enough WoW version. This only works for recent raid zones though, so instances like Molten Core and 5 man instances are still using old skool detection code or don't have difficulty detection enabled. If there's enough interest we can extend the detection for these instances, but for now, every WoD 5 man is called "5 normal".

Molten Core

Posted by Miles on 27 Nov 2014 17:39 CET

Molten Core has been added to the ranked raid zones on World of Logs! Do you still know how to handle Garr's bombs and Ragnaros' sons?

Sneak preview

Posted by Miles on 12 Nov 2014 18:13 CET

Sneak preview of what's coming next

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