www.viber.com/en speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 12:27 UTC. Grade C (73/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 44 ms 35%
- TCP connect 7 ms 6%
- Server wait 76 ms 60%
Measured on the connection that fetched the HTML. Every other request on the page waits for the end of this bar before it can start.
How this page compares
Every report published here is in this comparison, so it is a reference population of pages tested from one server - not a benchmark of the whole web.
What these numbers mean
- The server answered in 127 ms, which is fast: almost all of the wait is the page itself, not the host.
- The page transfers 11.82 MB over 26 request(s). Media files are 78% of it, so let video load on demand instead of on first paint.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- The largest element painted at 708 ms, inside the 2.5 s Google calls good.
- Layout stayed still (CLS 0.007), so nothing jumps under the reader's cursor.
- The main thread was blocked for 149 ms in total, which is not enough to feel.
Fix first: Image delivery and format - Serve WebP or AVIF with a JPEG fallback, size images to the space they occupy, and lazy-load anything below the fold. Images are usually more than half of a slow page.
Read on one shared server, not a visitor's phone: use it to compare pages against each other, not as a promise about every connection. We fix what these tests find.
Screenshot
What the page looks like
Loaded in headless Chromium on this server. Click an image to open it full size.
Browser render
The same URL loaded in a real browser, so these are the readings curl cannot produce. The grade above is still built from the server measurements.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 26 request(s) in total, 11.82 MB across all of them.
Top issues
Image delivery and format
high impact5 image(s) over 200 KB and 2 large image(s) still served as JPEG or PNG.
Fix: Serve WebP or AVIF with a JPEG fallback, size images to the space they occupy, and lazy-load anything below the fold. Images are usually more than half of a slow page.
Render-blocking resources
high impact11 render-blocking resource(s) in the document head (7 script(s), 4 stylesheet(s)). The page cannot paint until each one arrives.
Fix: Add defer or async to scripts that do not change the first paint, inline the critical CSS, and load the rest with media="print" plus an onload swap.
Total page weight
high impactThe page transfers 11.82 MB across 26 request(s), with the document itself at 15.5 KB.
Fix: Work through the heaviest assets first: images, then fonts, then third-party scripts.
Avoid extra redirects
medium impact2 redirect hop(s) before the page load started, each one a full round trip before the first byte.
Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Strict-Transport-Security
low impactHSTS is not set, so the first visit on a hostile network can still be downgraded to HTTP.
Fix: Send Strict-Transport-Security with a max-age of at least six months. Add includeSubDomains once every subdomain is HTTPS.
Waterfall
Slowest requests
Each bar is one request's own response time, scaled to the slowest. Assets were fetched in parallel, so the bars overlap in real time rather than stacking. first party third party
| Request | Type | Status | Time | Size |
|---|---|---|---|---|
| https://www.googletagmanager.com/ns.html?id=GTM-KCHBLWM 3rd party | html | 200 | 972 ms | 92 B |
| https://www.viber.com/app/themes/viber/assets/images/close-button.png | images | 200 | 887 ms | 1.5 KB |
| https://www.viber.com/app/themes/viber/assets/video/home-video-v5.mp4 | media | 200 | 886 ms | 9.24 MB |
| https://www.viber.com/app/uploads/DOWLOAD.png | images | 200 | 881 ms | 10.8 KB |
| https://cdn.cookielaw.org/scripttemplates/otSDKStub.js 3rd party | javascript | 200 | 876 ms | 13.6 KB |
| https://cdn.cookielaw.org/consent/bbd6f43a-699b-4d6e-b411-627e0bd9c887/OtAutoBlock.js 3rd party | javascript | 405 | 873 ms | 18 B |
| https://www.viber.com/app/themes/viber/assets/images/logov2.svg | images | 200 | 871 ms | 2.2 KB |
| https://www.viber.com/app/uploads/multi.gif | images | 200 | 870 ms | 846.6 KB |
| https://www.viber.com/app/uploads/Videocall-1.gif | images | 200 | 870 ms | 805.8 KB |
| https://www.viber.com/app/uploads/Legcat.1517733927.gif | images | 200 | 870 ms | 339.3 KB |
| https://www.viber.com/app/uploads/New-social-473x504-2.png | images | 200 | 870 ms | 268.6 KB |
| https://www.viber.com/app/uploads/Security_white_1X.png | images | 200 | 870 ms | 198.5 KB |
| https://www.viber.com/app/themes/viber/assets/images/footer-logo-gradient.png | images | 200 | 870 ms | 44.8 KB |
| https://www.viber.com/app/mu-plugins/jquery-updater/js/jquery-3.6.0.min.js?ver=3.6.0 | javascript | 200 | 870 ms | 35.2 KB |
| https://www.viber.com/app/uploads/Group_chat_258_236.gif | images | 200 | 870 ms | 26.4 KB |
| https://www.viber.com/app/uploads/appgallery.png | images | 200 | 870 ms | 10.6 KB |
| https://www.viber.com/app/uploads/Apple.png | images | 200 | 870 ms | 6.8 KB |
| https://www.viber.com/app/uploads/viber-logo-2026.png | images | 200 | 870 ms | 5.9 KB |
| https://www.viber.com/app/mu-plugins/jquery-updater/js/jquery-migrate-3.4.0.min.js?ver=3.4.0 | javascript | 200 | 870 ms | 5.1 KB |
| https://www.viber.com/app/themes/viber/dist/scripts/main-faf9db4319.js | javascript | 200 | 870 ms | 2.3 KB |
| https://www.viber.com/app/themes/viber/assets/images/secure-tag.png | images | 200 | 870 ms | 1.7 KB |
| https://www.viber.com/app/themes/viber/assets/images/arrow-down.png | images | 200 | 870 ms | 1.2 KB |
| https://www.viber.com/app/themes/viber/assets/scripts/object-fit-videos.min.js | javascript | 200 | 870 ms | 1.2 KB |
| https://www.viber.com/app/themes/viber/assets/scripts/js.cookie.min.js | javascript | 200 | 870 ms | 842 B |
| https://www.viber.com/app/plugins/stop-user-enumeration/frontend/js/frontend.js?ver=1.4.4 | javascript | 200 | 870 ms | 266 B |
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