2.9.30
Released 8 Nov 2026
Official Decade Web website
Website speed test agent for Windows
Decade Web 2.9.30 fetches your page, reads headers, inspects files and proposes changes you review for a website speed test and page speed test. It measures site speed.
Compress the largest images and add caching headers to speed up the home page.
- http_get
https://example.com/status 200 - list_dir
./assets/images12 files - grep
list_dir3 matches - edit_file
index.html+1 line added - write_file
speed-log.txtsaved - Shell
webdecade.com0.45s
waiting for your OK before the next stepRejectAccept
34 MB
Setup program download
25 MB
Single .exe file
13
Interface languages
3 types
Cloud, local, built-in
3 modes
Auto, Ask first, Plan
Website speed test agent
Decade Web performs a website speed test on Windows 10 or 11, and it records Core Web Vitals values in your log file. It runs locally. The agent reads headers and timings from your PC to identify issues. A cloud model still receives prompts for analysis of the results.
Check website speed on mobile
The agent uses http_get to fetch the mobile page and read response headers, while grep finds large images in your folder to list the three heaviest files during the analysis phase. Start testing. You review the diff in Ask first mode before any changes occur. This check website speed process counts files created, edited and read. Decade Web runs locally on your PC for Windows 10 and 11. how page speed affects seo is clear when you measure the results.
Tool trace
http_get https://example.com → status 200
list_dir → 3 matches
edit_file index.html → +1 lineImprove page loading speed
Decade Web 2.9.30 uses edit_file to suggest deferring scripts and Shell to run a linter that verifies syntax before applying changes to the page. Approved changes. It reads CSS files to find blocking resources that slow down the site. It uses grep to locate the heaviest scripts in the working folder. The exit code shows the command succeeded and the speed is re-measured. This website loading speed improvement is verified by the exit code.
Tool trace
http_get https://example.com -> status 200, headers parsed
grep -r "src=" index.html -> list_dir finds 10 images
edit_file index.html -> diff shows deferred script
Shell "curl.exe -w '%{time_total}' -o NUL https://example.com" -> 0.8s output savedReduce website loading speed issues
The agent writes a caching plan in Plan only mode, and you switch to Ask first to verify each action before it changes your files. Check the log. Use read_file to confirm the changes and improve performance significantly. Shell runs the command to apply the settings immediately on your machine. The tool saves the detailed report to a log file for later review. Interface in 13 languages supports the user experience during the process.
Perform website speed analysis
The agent runs a baseline test on your desktop view and measures LCP and INP scores so you can compare the before and after numbers in a table. Log it. What is slowing down your site when the page loads slowly? The tool records results using write_file to store data for later analysis. Use read_file to review the saved report and verify changes made to the page. Good is 200 milliseconds or less for INP, and CLS measures layout shift.
How it differs from a typical chat assistant
Decade Web 2.9.30 runs tools autonomously and shows real results, so you can understand why page speed so slow and fix performance issues.
| Typical chat assistant | Decade Web | |
|---|---|---|
| Actions | Suggests steps only | Runs tools itself |
| Visibility | Hides internal steps | Shows cards with results |
| Control | Approval depends on the tool | Ask first or Plan only |
| Output | Text summary | Real file diffs and logs |
How to use Decade Web
- Download the 34 MB setup for Windows 10 or 11.
- Install the agent on your local machine.
- Open the chat and type your speed task.
- Review the diff and approve the changes.
Who uses Decade Web
Decade Web runs on Windows 10 or 11 to measure Core Web Vitals and speed is one factor among many, so results are not promised. Fix it. Use the agent to optimize your site for better performance.
Developers use the Shell to run linters and edit CSS files directly, so the agent shows diffs for review while ensuring every action appears in the chat as a card with its real result. No account needed. It runs the tools itself to fix issues without delay.
Freelancers use Plan only mode to write a strategy first, so they execute changes later while the tool records every step taken during the process. Clear plan. Execution follows with recorded steps for clients' sites.
Frequently asked questions
What is a website speed test?
A page speed test measures how fast a page loads and it checks Core Web Vitals like LCP and INP on your PC to see performance. Measure first. You must repeat tests several times to compare the middle value.
Is webdecade.com the official Decade Web website?
Yes, webdecade.com is the official Decade Web website, and the download button provides the 34 MB setup program for Windows, so you should verify the SHA-256 checksum with certutil before installation. Check the hash. The installer is not code-signed yet, so compare it with the published manifest to ensure safety.
Does the agent run locally?
Yes, the app runs on your PC and with a local model nothing leaves it, while with a cloud model your prompts and file text go to that provider. Updates are automatic. The app shows an Update button when a new version is ready.
What is the difference between Auto-run and Ask first?
Auto-run is an approval mode where actions execute immediately, while Ask first pauses before every change so you can review the diff and maintain full control over your workflow. This approach ensures you stay in charge of every decision made during the process.
How does Plan only work?
Plan only mode is a setting that writes a plan and runs nothing, so you switch modes to carry it out later when ready. It is a plan. Plans survive restarts so you can carry them out later.
Can I use a local model?
Yes, you can use a local model and the built-in model is ready to use without your own endpoint, so you can start testing immediately. Ready now. No account is needed to run the application on your PC.
Is this a load test?
No. A speed test is a handful of ordinary page loads. It is not a load test or stress test: never send many requests to a site you do not own and never use tests to put pressure on a server. Repeat tests to compare the middle value.
Start your speed test
Decade Web runs your tests on Windows. Version 2.9.30 is ready. Download the 34 MB setup now.
Download Decade Web for Windows ↗Navigation
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