Free Tools

Check a live website's speed, security, and health. Convert, merge, and compare files right in your browser.
No tracking. Just tools that work.

The complete check

Website Health Check

Find out what's driving visitors away from your site, and whether someone could send email pretending to be you. One test, about a minute.

Run the Website Health Check

Individual checks

AI Crawler Checker

See whether ChatGPT, Claude, and Perplexity can read your site, bot by bot.

Website Speed Test

Google Lighthouse scores for any site: performance, accessibility, best practices, and SEO.

SSL Checker

Certificate validity, expiry date, and HTTPS status for any domain.

Redirect Checker

Trace the full redirect chain: http to https, www, loops, and the final page.

Security Headers Checker

Grade HSTS, CSP, X-Frame-Options, and the rest of your response headers.

Open Graph Checker

Preview your share card and check the tags behind it.

DMARC Checker

Look up a domain's DMARC policy and what it does to spoofed email.

SPF Checker

Check whether a domain declares who may send email on its behalf.

Robots.txt Checker

See which crawlers a site lets in, from Googlebot to GPTBot.

Utility tools

Word to PDF

Convert .docx files and images to PDF. Also exports as HTML, Markdown, and Word.

Merge PDF

Combine multiple PDFs into one file. Drag to reorder. One-click download.

PDF to Markdown

Convert one or many PDFs to clean Markdown for AI tools. Each file keeps its name. Download a .md or a .zip. No upload.

Compare Documents

Compare two PDFs, Word files, or text documents and highlight every change. Removed text in red, added in green. No upload.

Character Counter

Count characters, words, and sentences as you type, and check the text against a page title, meta description, or social post limit.

Time Zone Converter

Convert a date and time between any zones, with UTC offsets, daylight saving handled, and a flag when it lands on another day.

Markdown to Word

Convert Markdown to clean Word (.docx) documents. Also exports as HTML and PDF.

Remove Markdown Formatting

Paste markdown from ChatGPT or Claude. Get clean text or formatted output. Free and instant.

Why we built free tools that never touch your files

In March 2025, the FBI Denver Field Office warned that criminals are using free online file converter sites to distribute malware. Sites that looked completely legitimate (and actually performed conversions) were silently installing info-stealers and ransomware on users' machines.

Even the "safe" conversion tools upload your files to their servers, run ad tracking on your document conversions, and have privacy policies that allow employee access to your files. Your tax return, your contract, your medical records. Processed on someone else's server, tracked by someone else's analytics.

We thought that was wrong. So we built something better.

How it works

The file tools run entirely in your browser. Your files never leave your device. There's no server processing them. We couldn't see your files even if we wanted to. They set a strict Content Security Policy that blocks outbound network requests: no fetch, no XHR, no WebSocket, no form submissions, no image beacons, no iframes. A security researcher can inspect the page source and verify. The website checks are the exception — the Website Health Check and every individual check: you give them a domain, not a file, and they look up that domain's public records server-side.

What we don't do

No analytics. No cookies. No tracking. No ads. We didn't even put Google Analytics on this page.

We don't even use a PDF library for document conversion. Your browser makes the PDF. We just make the document look good.

Why we're giving this away

We're Surmado. AI for small business. We believe if you handle people's data, you should respect it. These tools are us putting that principle into practice. Before we ask for a dollar.

If you like how we think, check out what we're building.

Let’s Rebuild Your Website

Get a free rebuild to approve before your domain moves.