pdffiller.com

Readiness by lane

Green: pdffiller.com. Thin bar: Work Productivity Apps peer median.

Priority fixes for pdffiller.com

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Accelerate

   Modern image formats in use

   Observed: The homepage had 79 images and none used WebP or AVIF.

   Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.

   What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.

   43% of Work Productivity Apps peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.

   Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

2. Priority 2 · Accelerate

   No render-blocking scripts in <head>

   Observed: The homepage <head> loaded 1 external script without async or defer.

   What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.

   52% of Work Productivity Apps peers do this.

   Guide: Control Third-Party Scripts Before They Control Your Page

3. Priority 3 · Harden

   Framing restricted

   Observed: The homepage did not send frame-ancestors or X-Frame-Options, so other sites may frame it.

   What to do: Send Content-Security-Policy: frame-ancestors 'self' (or a list of trusted origins). X-Frame-Options: SAMEORIGIN covers older browsers.

   50% of Work Productivity Apps peers do this.

   Guide: A Practical Website Health Check for Owners

4. Priority 4 · Accelerate

   HTTP/3 advertised

   Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.

   What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.

   40% of Work Productivity Apps peers do this.

   Guide: CDN Guide for Website Owners

What pdffiller.com already does well

Practices fewer than half of Work Productivity Apps peers use.

• Referrer-Policy setReferrer-Policy present.38% of peers
• HSTS kept for at least a yearHSTS with a 365-day max-age covering subdomains.42% of peers

What we saw

Homepage checked

https://www.pdffiller.com/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

DigiCert, 198-day validity, expiring 2027-02-26

DNS operators

Amazon Route 53

HSTS

max-age 365 days, includeSubDomains

DMARC policy

p=reject

Homepage HTML

248 KB, gzip

Images on homepage

79 (svg 78)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Work Productivity Apps sites

• camscanner.com71
• evernote.com72
• hackmd.io77
• trello.com81
• wps.com77

Work Productivity Apps readiness benchmark