HTTP Request Checker
List the HTTP requests that occur when loading a URL
Features
List all requests
Display every request that occurs during page loading, by URL
Measure processing time across 12 items
Visualize the time taken at each stage, such as DNS, TCP, and rendering
Organize by domain and type
Aggregate the breakdown by source domain and by type such as image or CSS
Capture with a real browser
Capture even requests generated dynamically by JS execution without missing any
How to use
Enter a URL
Paste the URL of the page you want to analyze into the input field
Run the analysis
Press the run button to load the specified URL and analyze the communication
Check the results
Display the request list, domain list, and processing-time breakdown
Use cases
Investigating display speed
Identify slow-loading communication and pinpoint areas for improvement
Reducing unnecessary loads
Find loads of unused images and scripts
Understanding external resources
Check the list of external domains and CDNs the site depends on
Analyzing the structure of other sites
Investigate the resource loading structure of competitor sites for reference
Basic Knowledge
Why Multiple Requests Occur on a Single Page
After the browser receives the initial HTML, it sequentially retrieves CSS, JavaScript, images, and tags from external services that are referenced within it. It is therefore normal for dozens to hundreds of requests to occur when displaying a single page.
Breakdown of Time Required for Display
A single request goes through stages in sequence: DNS address resolution, server connection, response wait, and data reception. By examining which stage is consuming time, you can narrow down the cause of slow display.
Safety and Privacy
Server-side processing
Input is processed on the server; only information necessary for the inquiry is sent.
Temporary processing only
For analyzing requests, temporary processing occurs on the server, then data is discarded after results are returned.
Communications encrypted with HTTPS
All sent and received data is encrypted by TLS and cannot be read by third parties.
Loads only the analysis target
Loads the target URL in a server-side browser and captures the requests
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Updates
- update #213
Add summary of total requests and combined size to HTTP Request Viewer
Featured Tools
RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
Use various tools such as lottery draws and raffles in live streams and videos.
Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.