# Filters


## What are Filters?
Filters control which reports are accepted and stored in your account. They allow you to cut through noise and focus on the reports that matter. You can configure your filters on the [Filters](https://report-uri.com/account/filters/) page.

Reports discarded by filters do not count towards your monthly quota.


## Sites to Collect Reports For
The most important filter to configure is the list of domains you want to collect reports for. Reports arriving from domains not on this list will be discarded. Each domain should be entered on a separate line without a scheme — for example `example.com` rather than `https://example.com`.

Subdomain matching is automatic — adding `example.com` will also match `www.example.com`, `app.example.com`, and any other subdomain.


## Global Report Filters
These filters apply to all incoming reports regardless of type.


**Remove "referrer" value**

Strips the referrer value from reports before storage. Referrer values cause many near-identical reports to be stored separately, so enabling this filter reduces duplication and makes your report data much easier to work with. Enabled by default.


**Remove query string and fragment**

Strips the query string (everything after `?`) and fragment (everything after `#`) from URLs in reports. Like the referrer filter, this reduces duplication by consolidating reports from the same page regardless of query parameters. Enabled by default.


**Minimum client reputation**

Reports from clients with a reputation score below the configured threshold will be discarded. This can help reduce noise from low-quality traffic. Set to 0 by default, meaning all clients are accepted.


## Advanced Report Filters

**Filter reports caused by browser extensions**

Browser extensions are one of the biggest sources of false-positive reports, as they inject scripts and modify pages in ways your policy doesn't expect. This filter removes reports that are identified as being caused by extensions. Enabled by default.


**Filter unactionable reports**

Removes reports caused by factors outside of your control, such as browser plugins, internal browser behaviour, or other sources that you cannot meaningfully act on. Enabled by default.


**Filter reports with a 'data' blocked-uri**

Discards reports where the blocked URI is `data`. These are often caused by browser extensions or injected content and are rarely actionable.


**Filter reports with an 'about' blocked-uri**

Discards reports where the blocked URI or source file starts with `about` (such as `about:blank`). These are commonly caused by browser extensions redirecting URLs and are usually not actionable.


## Default Filters
When you create an account, the following filters are enabled by default:

| Filter | Default |
|--------|---------|
| Remove "referrer" value | Enabled |
| Remove query string and fragment | Enabled |
| Filter reports caused by browser extensions | Enabled |
| Filter unactionable reports | Enabled |
| Filter reports with a 'data' blocked-uri | Disabled |
| Filter reports with an 'about' blocked-uri | Disabled |

We recommend keeping the default filters enabled. They remove the most common sources of noise without discarding reports that are genuinely useful.


## Report Sampling
Sampling lets you configure what percentage of reports are accepted for each report type. This is useful for high-volume report types where you only need a representative sample. See the [Sampling](/setup/sampling/) page for full details.