We’ve compiled and organized a set of answers to the most commonly-asked questions about Optimizely Classic.
Don’t see your question on this list? We welcome your feedback! Please scroll to the bottom of the page to click open the dialog box. Select the No option, then let us know what you're looking for.
Looking for the definitive guide to getting up and running with Optimizely? Learn and practice your Optimizely skills and web optimization strategy in Optimizely Academy. Or check out these short videos that explain how to set up an experiment, how to QA your experiment, and how to interpret your results.
Have questions about Optimizely for iOS? We have a separate mobile FAQ for that!
Looking to troubleshoot your experiment? Check out this list of common issues.
- Your visitors' browser sends tracking requests to Optimizely
- There may be a delay of up to 5 minutes before that file is then propagated to the edges on Optimizely's CDN (Akamai). You can access this file directly at this URL: http://cdn.optimizely.com/js/XXXXX.js where XXXXX is your Account ID. This file is referenced directly in your Optimizely snippet (click "Implementation" in the Optimizely Editor).
- t = 0 : "Save Experiment" clicked
- t = 5 seconds : Hosted Preview should now work correctly if you don't have your snippet on your site
- t = 5 minutes : Live Preview should now work correctly if you do have your snippet on your site
- If the snippet is not on your page, the Optimizely Editor will load your page through a proxy, injecting a placeholder snippet.
- This works just fine in most cases, but can occasionally cause some display issues.
- Certain browsers have recently implemented a security measure, which blocks insecure content (for example, an http image) from being loaded by an https page.
- We have an article describing mixed content and how to enable it.
- If you have confirmed both of the above and you are still unable to get your page into the Editor, there may be a restriction on your own website that is preventing Optimizely from loading your page.
- Check with your developer team to see if your site’s security settings allow it to be iFramed by a third party domain. For more information, read Combating Clickjacking with xFrame Options (non-Optimizely article).