OWASP Top 10 Checklist — Security Audit
Generate a comprehensive OWASP Top 10 (2021) security checklist with actionable items for each category.
How it works
- 1Configure your options above
- 2Click "Generate OWASP Checklist" — processing happens in your browser
- 3Copy or download the result
What to do next
About OWASP Top 10 Checklist
OWASP Top 10 Checklist is built for web and productivity utility jobs that fit cleanly into a browser tab. Generate a comprehensive OWASP Top 10 (2021) security checklist with actionable items for each category. The processing runs in the page itself, which is why the controls update instantly when you change settings and why a freshly loaded page is ready to do real work the moment it becomes interactive.
OWASP Top 10 Checklist is shaped for the gap between "I'll do it by hand" and "I'll script it." When the job is small enough that automating it would take longer than doing it, but annoying enough to want a focused tool — that is the situation this page is built for.
OWASP Top 10 Checklist runs the entire transformation inside your browser. The file is read by JavaScript running in the page, processed in-memory by standard browser APIs, and written back as a download. The browser is the runtime; the page is the interface. You can confirm what the tool does by opening the developer-tools Network tab during a run — the only requests are for the page's own static assets.
OWASP Top 10 Checklist is implemented on top of standard browser APIs. Inputs are read from the file picker or drop zone, decoded in the browser, processed, and re-encoded into the output format. Files up to 0 MB are well within the comfort zone of any modern browser.
On limits: 0 MB per file is the ceiling. Output formats and quality settings are listed in the controls panel above, and they apply to every run.
The heaviest users of OWASP Top 10 Checklist tend to be marketers running campaigns, community managers planning posts and site owners auditing pages. Each group brings slightly different expectations to the tool, but the same single-page architecture serves every one of them with the same response time.
The output handed back by OWASP Top 10 Checklist is the output file. If you would prefer to keep the result in the browser instead of downloading it, you can copy it from the result panel and paste it directly into another tab — useful when the next tool in your workflow expects pasted text rather than a file.
OWASP Top 10 Checklist sits in a small group of related tools. Useful neighbours include Web Security Checklist, Firewall Rule Generator, CSP Header Validator, and JWT Validator. They are designed to compose: the output of one is a sensible input to the next, so a multi-step task is usually a sequence of single-click operations.
The transformation in OWASP Top 10 Checklist is deterministic — the same input plus the same options produces the same result every run. That predictability matters when the result has to match an upstream specification or be reproducible later.
Some background on the design choices behind OWASP Top 10 Checklist: every option you see on the page is there because a real workflow needs it, and every option that is not shown has been deliberately omitted to keep the common case fast. The bias is toward minimal-but-complete.
As a single-page tool, OWASP Top 10 Checklist stays focused on one web and productivity utility step. Multi-step workflows are composed by chaining adjacent tools — each tool produces a standard file the next one can read directly, so a longer pipeline is just a sequence of short tab-and-tab visits.
Tips from users who reach for OWASP Top 10 Checklist regularly: process one input first to confirm the settings produce what you expect before committing to a batch; treat the page as the working surface and avoid leaving large jobs running in a backgrounded tab where the browser may throttle JavaScript; and if a particular file fails, check whether the source is intact by opening it in its native viewer — most "tool errors" are actually input errors.
If the result is not what you expected, the most common causes are easy to check. Confirm the input is under the 0 MB ceiling — files just above the cap fail silently because the engine refuses to allocate the buffer. Confirm the input is one of the supported formats. And if the page itself feels slow, try closing other heavy tabs to free up memory; the engine runs in your browser, so it competes for the same resources as everything else open.
OWASP Top 10 Checklist is intentionally narrow in scope so the common case is fast and the result is predictable. If you ever need a variation it does not cover, browse the rest of the catalog — there is a good chance an adjacent tool already exists, and switching between tools is just a matter of opening another tab.
How it works
- 1Open the OWASP Top 10 Checklist workspace above. The interface is a single page, so there is nothing to navigate.
- 2Add your web utility input by dropping it onto the page or browsing for it.
- 3Adjust the options to match what you need. Sensible defaults cover the most common case, so you can usually skip this step.
- 4Click to start the job. The engine (standard browser APIs) processes the input in the page; you can watch the progress indicator until it completes.
- 5Save the output when it is ready.
- 6Run additional jobs as needed. The same controls and defaults apply on every run.
Common use cases
- Generate a campaign asset in seconds for a quick test using OWASP Top 10 Checklist.
- Sanity-check a webhook response while debugging.
- Compare two product variations side by side.
- Run a fast accessibility check before publishing.
- Audit a marketing page before launch.
- Plan content without paying for a SaaS dashboard.
- Pull a quick reference number for a status update.
- Create a placeholder image for a wireframe.
- Run a one-off check during a meeting without context-switching.
- Preview how a result looks before deploying it.
FAQ
What is OWASP Top 10?
A standard awareness document for developers representing the 10 most critical web application security risks.
Which version?
Based on the OWASP Top 10 2021 edition — the most recent release.
Is this a complete audit?
It is a starting checklist. A full security audit requires deeper testing and domain-specific analysis.
Private?
Yes — generated locally.
Output formats?
Available in plain text or Markdown format for easy integration into documentation or issue trackers.
Can I customize it?
Copy the output and add, remove, or modify items to match your project needs.
Will OWASP Top 10 Checklist keep working in a year?
OWASP Top 10 Checklist is updated whenever the underlying engine releases an improvement or a bug fix. Because the tool is delivered as a static page, every visit fetches the latest version automatically — there is no "version" to manage on your end. If a particular release ever changes default behaviour, the change is documented on Favtoo's changelog so you can confirm what shifted.
Why use OWASP Top 10 Checklist instead of a paid online tool?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. OWASP Top 10 Checklist sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common web and productivity utility operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
Does OWASP Top 10 Checklist work with screen readers?
OWASP Top 10 Checklist uses native HTML controls wherever possible, which means keyboard navigation, focus rings, and screen-reader labels work the way the platform expects. The drop zone accepts files via the keyboard-accessible file picker as well as drag-and-drop, and result downloads use standard browser download flows. If you spot an accessibility gap, Favtoo treats it as a bug worth fixing.
Which browsers are supported by OWASP Top 10 Checklist?
OWASP Top 10 Checklist works in any modern browser released in the last few years — Chrome, Edge, Firefox, Safari, Brave, Arc and the major Chromium derivatives are all supported. The underlying engine relies on widely-supported web APIs, so there is nothing exotic to install. If you are on a very old browser version and the tool fails to load, updating to the latest release of your preferred browser is the only fix needed.
Can I process multiple files at once with OWASP Top 10 Checklist?
OWASP Top 10 Checklist processes one input at a time by design — it keeps memory usage predictable on lower-end devices and makes results easier to verify. To handle a folder, run the tool once per file; the page stays loaded between runs and remembers your last-used settings, so the second run is essentially instant.
What permissions does OWASP Top 10 Checklist need to function?
OWASP Top 10 Checklist only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
Are there any restrictions on using OWASP Top 10 Checklist at work?
OWASP Top 10 Checklist can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.
How accurate is OWASP Top 10 Checklist?
OWASP Top 10 Checklist is built on standard browser APIs, which is the same class of engine used by professional web and productivity utility pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.