Loading…
Skip to contentTest cross-origin requests via proxy. Tentaco CORS Tester: review input and get an instant result — free, no sign-up.
Full tool — runs in your browser. No sign-up required.
Loading…
Test cross-origin requests via proxy. Runs locally in your browser unless noted otherwise.
Paste or enter your input into Tentaco CORS Tester. This mode uses an online service — check the privacy details before you start.
The primary button opens the matching studio mode so you can start without an account. People often search for: cors tester.
Open CORS Tester via the studio button (direct mode).
Paste or type your input.
Adjust options and review the preview or output.
Copy or save the result and re-run if needed.
Online feature: this mode sends data to an online service or Tentaco backend. Do not upload highly sensitive files unless you accept that transfer.
OnlineThis feature needs an online service. Do not upload highly sensitive files unless you accept that transfer.
Yes for this online mode. CORS Tester sends the data required for the request — see the privacy block.
Yes. Copy the output from CORS Tester or download it when the tool offers a file.
CORS Tester follows the formats named in the UI and description. Unlisted variants are not guaranteed.
CORS Tester needs a connection for online steps. Local parts may still work after load.
CSP Decoder online — free in your browser
Decode CSP directives for readability. Tentaco CSP Decoder: review input and get an instant result — free, no sign-up.
HTTP Header Diff online — free
Compare two HTTP header blocks. Tentaco HTTP Header Diff: review input and get an instant result — free, no sign-up.
CSP Generator online — free in your browser
Build Content-Security-Policy headers. Tentaco CSP Generator: review input and get an instant result — free, no sign-up.
DNS Lookup online — free in your browser
Resolve A, AAAA, MX, TXT and CNAME records. Tentaco DNS Lookup: review input and get an instant result — free, no sign-up.
Cookie Inspector online — free
Parse Set-Cookie and Cookie header strings. Tentaco Cookie Inspector: review input and get an instant result — free, no sign-up.
SSL Certificate Viewer online — free
Inspect TLS certificate for a hostname. Tentaco SSL Certificate Viewer: review input and get an instant result — free, no sign-up.
HAR Viewer online — free in your browser
Inspect HTTP Archive (HAR) capture files. Tentaco HAR Viewer: review input and get an instant result — free, no sign-up.
robots.txt Tester online — free
Fetch and validate robots.txt for a site. Tentaco robots.txt Tester: review input and get an instant result — free, no sign-up.