Sada Files
  1. 1Choose file
  2. 2Adjust
  3. 3Download

Check a public page

Enter a URL in the settings and run the check. Our server fetches the page through an SSRF-safe fetcher, analyses it in memory and stores nothing.

Fetched by our server — public addresses only, nothing stored or logged.

Page Speed Waterfall Analyzer online, free

Simulate and visualize asset loading waterfall, TTFB latency, DNS resolution, and resource weight breakdown.

  • Runs in your browser — no upload
  • Free, no sign-up, no watermark
  • HTML
  • TXT
How to use Page Speed Waterfall Analyzer · Page Speed Waterfall Analyzer — frequently asked questions

How to use Page Speed Waterfall Analyzer

  1. 1

    Add your HTML and TXT file

    Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.

  2. 2

    Fine-tune the settings

    Set source mode in the Fine-tune panel, or keep the defaults — they suit most files.

  3. 3

    Run Page Speed Waterfall Analyzer

    Press the start button. Processing happens on your device, usually in seconds.

  4. 4

    Download the result

    Save the finished file, or continue with another tool without downloading in between.

What Page Speed Waterfall Analyzer can do

  • Source Mode: url and paste
  • Private by design — files are processed in your browser and never uploaded
  • Free with no sign-up, no watermark and no daily limit

Page Speed Waterfall Analyzer — frequently asked questions

What is a resource load waterfall?

A waterfall diagram maps the chronological sequence of network requests required to render a webpage. It reveals DNS lookup times, TCP connection setup, TLS handshakes, Time to First Byte (TTFB), and resource download durations.

How does this tool categorize page assets?

Assets are categorized into HTML documents, CSS stylesheets, JavaScript files, images, web fonts, media, and third-party tracking scripts with exact byte sizes and transfer percentages.

What is TTFB and why does it affect overall page speed?

Time to First Byte (TTFB) is the time the browser waits between requesting a page and receiving the first byte of response data from the server. High TTFB indicates slow backend database queries or lack of edge caching.

Can I analyze resource waterfalls without publishing a page?

Yes. Paste your HTML markup into Paste mode to generate an asset payload breakdown, identifying heavy embedded assets, base64 strings, and critical path resources before going live.

Does Sada Files record or profile my website traffic?

No. Sada Files conducts zero tracking, profiling, or telemetry. All simulations are performed in ephemeral memory and discarded immediately.

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