Clear-Site-Data: cache · ControlCurrent

Support in current browsers

Checked against the current browser versions recorded in MDN browser data 8.1.5.

Browser	Minimum	Outcome	Reason
Chrome	155	Works with limits	Every required mapped feature is available, but BCD records one or more qualifications.
Edge	154	Works with limits	Every required mapped feature is available, but BCD records one or more qualifications.
Firefox	157	Works	Every required mapped BCD feature is available without a recorded qualification.
Safari	27	Works	Every required mapped BCD feature is available without a recorded qualification.
Chrome for Android	155	Works with limits	Every required mapped feature is available, but BCD records one or more qualifications.
Firefox for Android	157	Works	Every required mapped BCD feature is available without a recorded qualification.
Safari on iOS	27	Works	Every required mapped BCD feature is available without a recorded qualification.
Android WebView	155	Works with limits	Every required mapped feature is available, but BCD records one or more qualifications.
Samsung Internet	30.0	Works with limits	Every required mapped feature is available, but BCD records one or more qualifications.

The release trace

How support changed

Each segment groups recorded releases with the same result. Gaps between recorded versions are not filled in. This is support at each release, rather than the planner’s check of every release above a minimum.

Chrome

http.headers.Clear-Site-Data.cache

1 – 6060 recorded releases
Not supported
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
61 – 622 recorded releases
Works with limits
- Partial implementation
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
63 – 642 recorded releases
No longer supported
- Partial implementation
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
- Support was removed in 63
65 – 12661 recorded releases
Works with limits
- Partial implementation
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
127 – 15529 recorded releases
Works with limits
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.

Edge

http.headers.Clear-Site-Data.cache

12 – 187 recorded releases
Not supported
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
79 – 12647 recorded releases
Works with limits
- Partial implementation
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
127 – 15428 recorded releases
Works with limits
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.

Firefox

http.headers.Clear-Site-Data.cache

1 – 6265 recorded releases
Not supported
63 – 9331 recorded releases
Works
94 – 13744 recorded releases
No longer supported
- Support was removed in 94
138 – 15720 recorded releases
Works

Safari

http.headers.Clear-Site-Data.cache

1 – 16.639 recorded releases
Not supported
17 – 2722 recorded releases
Works

Chrome for Android

http.headers.Clear-Site-Data.cache

18 – 6037 recorded releases
Not supported
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
61 – 622 recorded releases
Works with limits
- Partial implementation
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
63 – 642 recorded releases
No longer supported
- Partial implementation
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
- Support was removed in 63
65 – 12661 recorded releases
Works with limits
- Partial implementation
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
127 – 15529 recorded releases
Works with limits
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.

Firefox for Android

http.headers.Clear-Site-Data.cache

4 – 6256 recorded releases
Not supported
63 – 9321 recorded releases
Works
94 – 13744 recorded releases
No longer supported
- Support was removed in 94
138 – 15720 recorded releases
Works

Safari on iOS

http.headers.Clear-Site-Data.cache

1 – 16.636 recorded releases
Not supported
17 – 2722 recorded releases
Works

Android WebView

http.headers.Clear-Site-Data.cache

1 – 6032 recorded releases
Not supported
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
61 – 622 recorded releases
Works with limits
- Partial implementation
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
63 – 642 recorded releases
No longer supported
- Partial implementation
- Setting this value may prevent a page from fully loading. See <a href="https://crbug.com/41343050">bug 41343050</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
- Support was removed in 63
65 – 12661 recorded releases
Works with limits
- Partial implementation
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
127 – 15529 recorded releases
Works with limits
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.

Samsung Internet

http.headers.Clear-Site-Data.cache

1.0 – 8.220 recorded releases
Not supported
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
9.0 – 27.029 recorded releases
Works with limits
- Partial implementation
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.
28.0 – 30.03 recorded releases
Works with limits
- Partial implementation
- Some requests may still be taken from the cache unless the tab is reloaded or the page is requested in a new tab. See <a href="https://crbug.com/364634040">bug 364634040</a>.
- Setting this value may cause seconds-long hangs. See <a href="https://crbug.com/40233601">bug 40233601</a>.

BCD 8.1.5 · catalogue 2.3.0. Source corrections can change this trace without a new browser release.

A fixed result snapshot

What those browser runs reported

Reviewed 11 October 2026

These are published results from specific stable-labelled browser builds. They are separate from the compatibility calculation and from evidence about your application. File outcomes and subtest counts stay separate. OK describes a completed harness, which can still contain failing subtests; Pass and Fail can also describe tests without a harness.

Selected directive tests: Cache eviction, subsequent fetches, partitioning and back/forward cache behaviour.

The selected files include wildcard-clearing cases and tentative partitioning tests. File totals do not isolate every cache directive subtest or prove that application logout removes all cached data.

Counts cover every subtest reported by each selected file, including any setup or complementary cases. They are not isolated directive pass counts or application evidence.

Exact browser builds, systems and source revision

firefox 157.0 · linux 22.04 · stable
Run 4877098740350976 · 2026-10-06T10:36:34.451Z to 2026-10-06T11:50:28.028Z
cc74d2669f5de548e808779877d1d33339ec5115
safari 27.0 (22625.1.29.11.27) · mac 27.0 · stable
Run 5164107446878208 · 2026-10-06T06:14:03.64Z to 2026-10-06T09:13:55.471Z
cc74d2669f5de548e808779877d1d33339ec5115
chrome 154.0.8037.92 · linux 22.04 · stable
Run 6218298311311360 · 2026-10-06T07:44:01.102Z to 2026-10-06T11:57:16.569Z
cc74d2669f5de548e808779877d1d33339ec5115

“Stable” is the upstream run label. Complete runtime flags were not supplied by the summary API. These results do not cover every browser version, mobile platform or operating system.

Cache clearing

clear-site-data

4 of 4 selected test files have retained results. The parent directory contains 15 retained files from 31 returned search matches. Only the exact files listed below enter these totals.

Browser build	Subtests passed / reported	File outcomes
firefox 157.0	29 / 29	4 OK
safari 27.0 (22625.1.29.11.27)	12 / 29	4 OK
chrome 154.0.8037.92	21 / 29	4 OK

Read all 4 retained file results

Test file	firefox	safari	chrome
`clear-cache-bfcache-partitioning.tentative.https.html`	OK · 2/2 subtests	OK · 1/2 subtests	OK · 1/2 subtests
`clear-cache-bfcache.https.html`	OK · 4/4 subtests	OK · 2/4 subtests	OK · 4/4 subtests
`clear-cache-partitioning.tentative.https.html`	OK · 10/10 subtests	OK · 7/10 subtests	OK · 6/10 subtests
`clear-cache.https.html`	OK · 13/13 subtests	OK · 2/13 subtests	OK · 10/13 subtests

Source API query (whole directory)Test source at the run revision

Source-response fingerprint

SHA-256 4dbadd51a6517e6aadc8708bbd8aa45873a7e80719fcf354a491ba4c6d8c63d0

The digest identifies the complete downloaded directory response used for this projection, before file selection. It does not authenticate the runner or prove that the results are truthful.

What this feature can and cannot do

Helps protect against

Residual client state after logout or reset

Does not guarantee

Server-side sessions
Data outside the directive's scope
Confirmation that clearing completed

What you need before using it

Secure-context delivery
A deliberate logout or reset flow
Review of effects on related applications

Fallback to keep in place

Invalidate server sessions and explicitly clear application state in the logout flow.

Browser data used

Support can be calculated

http.headers.Clear-Site-Data.cache

MDN reference

Specifications

w3c.github.io

Support across major browsers

Adoption information available

Web Platform Baseline indicates when a feature became available across major browsers. It does not inspect your website or replace the browser-by-browser result.

Clearing site data

http.headers.Clear-Site-Data.cache

Status: not Baseline

Public browser tests

Relevant tests found

Cache eviction, subsequent fetches, partitioning and back/forward cache behaviour.

Source reviewed 11 October 2026cc74d2669f5de548e808779877d1d33339ec5115

Cache clearing
- clear-site-data/clear-cache-bfcache-partitioning.tentative.https.htmlreviewed test source latest public results
- clear-site-data/clear-cache-bfcache.https.htmlreviewed test source latest public results
- clear-site-data/clear-cache-partitioning.tentative.https.htmlreviewed test source latest public results
- clear-site-data/clear-cache.https.htmlreviewed test source latest public results

Limit:The selected files include wildcard-clearing cases and tentative partitioning tests. File totals do not isolate every cache directive subtest or prove that application logout removes all cached data.