Wren Beta — what that means

yle.fi

readable, with friction

B Good. A minor flaw or two

Loading speed is diagnostic only; it does not affect this grade or search ranking.

SubjectWeightScore
Interruption 35.71% 65
Readability 28.57% not measured
Accessibility and keyboard 21.43% 96
Stability and weight 14.29% 100

This letter rests on 71% of the grade. The subjects marked “not measured” are left out rather than scored as zero (which would fail a site for something nobody looked at) or as full marks (which would be a claim we have not earned). How this is worked out.

yle.fi
Largest paint
0.6–6.2s
Paywall
none
Ad requests
0
Tracker requests
5
Page weight
434 KB
Readability
not measured
Accessibility
no automated violations detected
Green hosting
not measured
Measured
2026-08-31

Observed interruptions

Ad and tracker counts above are network requests, not counts of visible ads or separate companies. They do not affect the interruption score.

Assessed 3 sampled pages. The largest detected ad area was 0% of a sampled viewport. Verified prompts: Cookie dialog blocks the page, with no refuse button.

This is a sample, not a promise that the whole site has no interruptions. Ad detection can miss formats and content outside the sampled view. Older scans did not check visibility or overlapping ad rectangles as thoroughly. The score uses the strongest observed deduction, so one panel is not penalized under multiple names. How interruptions are scored.

The type, and who can use it

Measured on 1 rendered page; latest measurement 2026-09-05. Every number is a mechanical fact about the page, not a judgment of its design.

WhatMeasuredThe bar
Body type size not measured 16px, the browser default
Characters per line not measured 45–90
Line height not measured 1.5 (WCAG 1.4.8)
Text contrast not measured 4.5:1 (WCAG AA), 7:1 (AAA)
Text column not measured at least 45%
Reflows at phone width yes WCAG 1.4.10
Dark mode respects the system setting noted, not scored
Automated accessibility checks no automated violations detected WCAG 2.1 A and AA, via axe-core
Keyboard no trap; focus visible on 80% of stops never trapped, always visible
Structure main landmark, 1 h1, no skipped heading levels a main landmark, one h1, no skips
Alt text no content images every content image
Reader mode parses parses (Firefox’s Readability)

Automated accessibility checks catch an estimated 30–40% of real problems, so “no automated violations detected” is a floor, not a certificate. We never say “accessible”. How these are scored.

Recorded automated findings

Recorded behaviorPolicy costUse in this grade
Cookie dialog blocks the page, with no refuse button 0.35 Strongest verified cost only

These records are retained for inspection. Only verified interruption evidence contributes to that subject; uncertain records are not silently treated as clean. Metering keeps its separate grade cap. These costs are not currently applied as search-ranking multipliers.

Measurement dates

Oldest evidence 50 days old. At least one subject is due for rechecking (30 days or older). Dates refer to the evidence, never the card rebuild.

Measurement history

Newest 4 saved observations. Each describes a sampled page at that time; older, failed or held observations do not override the current reviewed card. Raw automated findings may have been superseded by later review or detector replay. No previous grade is inferred.

Read dated observations
  1. — Readability and accessibility observation; prose source blocks; phone overflow not observed
    https://yle.fi/a/74-20131998
    Evidence source: readability-top5000.jsonl · observation 747cf6fbf029
  2. — Access observation: penalised; raw automated findings consent wall
    https://areena.yle.fi/1-71193336
    Evidence source: verdicts-top5000.jsonl · observation a7da53f63d05
  3. — Access observation: penalised; raw automated findings consent wall
    https://areena.yle.fi/1-71193342
    Evidence source: verdicts-top5000.jsonl · observation 067b3ad9b5d2
  4. — Access observation: penalised; raw automated findings consent wall
    https://yle.fi/a/74-20131998
    Evidence source: verdicts-top5000.jsonl · observation 10bdb3712ce2

How we know

Pages rendered3
Site verdicterrors dropped; majority of remaining; ties to the stricter verdict; active reviewed exclusions override admission
Figures shownnumeric measurements generally use medians; interruption costs, overflow, keyboard traps and accessibility failures retain the strongest observed finding
Speed varied0.6s to 6.2s across 3 pages, so we show the range rather than one number. A spread that wide usually means our measurement, not the site.
Cited by9,377 encyclopedia articles

Think this is wrong? It may well be — the measurements cover only a handful of pages. Any reviewed admission decision and its dated evidence are shown above. Re-measurement on request is not built yet, so there is no button here that would do anything. When it exists it will be free and it will be on this page.