Frequently Asked Questions

No. Every mdmundo tool processes your files entirely inside your browser. The file you select stays on your device. It never travels to our servers, and we never have a copy of it. This applies to every tool in the catalog — Markdown → HTML, Merge Markdown, Format Markdown, all of them. Most other online tools work the opposite way: they upload your file, process it on their servers, then send the result back. mdmundo doesn't. You can verify this yourself in 30 seconds: open your browser's developer tools (right-click → Inspect, or press F12), switch to the Network tab, drop a file into any mdmundo tool, and watch the Network tab during processing — you'll see no upload request to our servers.

Everything runs inside your browser. When you open a tool, the code it needs loads into the page once, then processes your files locally using your device's CPU and memory — no server round-trip. The flow is straightforward: you select a file (browser file picker, on your device), the file loads into browser memory (your RAM, never our servers), the tool processes the file (your CPU), the result is offered for download (browser download dialog, on your device), and when you close the tab all file data is discarded from memory. The same operations that traditional cloud services run on rented servers now run inside your browser tab.

Yes. Because your files never leave your device, there's no file data to store, transfer, or share with third parties. The only personal data we process is what's strictly necessary for the service to work: anonymized server logs (IP, user-agent, URL, timestamp), retained 30 days for security; Pro tier email addresses for license delivery via Lemon Squeezy; and any messages you send us at yourmundo@pm.me. Full details in our Privacy Policy. To exercise your GDPR rights (access, rectification, erasure, portability, objection), email yourmundo@pm.me. We respond within 30 days as required by GDPR Article 12.

No. We have no technical ability to see your file contents, names, or metadata. There's nothing to see — the files don't reach us. You can verify this by opening your browser's developer tools, switching to the Network tab, and processing a file. You'll see no upload requests. This is a structural property of the architecture, not a promise we ask you to trust. We literally cannot access what doesn't reach our infrastructure.

No. All processing happens in your browser's temporary memory. When you close the tab, that memory is released and the file data is gone. We don't write to your hard drive unless you explicitly click "Download." We don't use cookies to remember files between sessions.

Standard web server logs: your IP address, browser user-agent, the URL you visited, and a timestamp. These are kept for 30 days for security and abuse prevention, then deleted. We don't log file processing activity, tool usage tied to individuals, or anything about the content you process. We don't use tracking cookies. We don't share data with advertisers.

Yes, and this is one of the strongest reasons mdmundo exists. Lawyers handling privileged client documents, accountants processing tax records, healthcare workers handling patient information, and journalists protecting sources all need to be certain their files aren't passing through someone else's infrastructure. Browser-only processing provides that certainty. The user remains responsible for compliance with their professional regulations: for HIPAA (US healthcare), browser-only processing avoids the Business Associate Agreement question entirely because no PHI reaches us as a covered entity, but you remain responsible for your own HIPAA controls. For attorney-client privilege, files never reaching third-party infrastructure preserves privilege in a way cloud-based tools cannot. For financial regulations (GDPR, GLBA, PCI-DSS, and similar frameworks), these have their own requirements you must meet independently. mdmundo is a tool, not a compliance solution — we provide the architectural foundation; regulatory compliance remains your responsibility.

Browser-only processing means PHI (protected health information) in your files never reaches us as a covered entity, so the typical HIPAA Business Associate Agreement question doesn't arise. That said, "HIPAA-compliant" is a property of your overall workflow, not of any single tool. You remain responsible for the security of the device processing the file, your network connection (TLS protects mdmundo loading; your file processing is local), any export or sharing you do after processing, and workforce training, access controls, and audit logging on your end. If you handle large volumes of PHI under strict HIPAA oversight, consult your compliance officer before adopting any tool, including ours.

Everything happens locally, inside your browser. When you open a tool, it loads a small amount of processing code into the page, and from then on your files are handled entirely on your own device — using its CPU and memory, the same way a desktop app would. Nothing is sent to us: the file you pick never leaves your computer or phone, and the finished result is handed straight back to you as a download. This is what lets mdmundo promise that your documents stay private — there's no server in the loop to upload them to. It also means the tools keep working even if your connection drops mid-session, and they run anywhere a modern browser does.

Partially. The first time you visit, mdmundo needs to download the tool's code from the server. After that, many tools continue to work even if you lose your internet connection mid-session. You won't be able to load a new tool without reconnecting, but the tool you're currently using will keep processing files locally. This makes mdmundo unusually useful in conditions where most cloud tools fail: airplane Wi-Fi, rural connections, mobile data caps, regional internet outages, and locations where data sovereignty rules restrict cross-border file transfer.

Chrome 117 or newer, Edge 117 or newer, Safari 17.4 or newer, Firefox 137 or newer, Mobile Safari (iOS) 17.4 or newer, Mobile Chrome (Android) 117 or newer, and any Chromium-based browser (Brave, Opera, Vivaldi, Arc) of similar vintage. The version floor exists because mdmundo uses modern browser features that older browsers don't implement well. If a tool refuses to load, the most common cause is an outdated browser.

Because your laptop or phone is doing the work that a competitor's data center would normally do. A modern Mac or PC handles most operations as fast as a server, but for very large files (over 100 MB) or computationally heavy operations (converting a long, image-heavy Word document), local processing can take longer than uploading to a server farm. This is the deliberate trade-off for keeping your file on your device. For most users with most files, the difference is unnoticeable. For edge cases (huge files, slow devices), server-based tools may genuinely be faster.

Yes. The interface is responsive and works on iOS and Android. The same browser-only architecture applies — your file stays on your phone. The practical constraint is memory: phones typically have less RAM than computers, so very large files may fail or run slowly on mobile. For files under 50 MB, mobile works well for most tools.

Not currently. mdmundo runs entirely in the mobile browser. We chose this over native apps for three reasons: native apps require Apple/Google revenue share (15-30%), raising prices for users; native apps require continuous platform maintenance that distracts from the core product; and the mobile browser experience already covers most use cases for a privacy-first tool. Native apps may come in 2027 if mobile-first emerging markets adoption justifies the investment. For now, "Add to Home Screen" from your mobile browser gets you an app-like icon and full-screen experience.

The free tier supports files up to 50 MB with 2 operations per day. Paid tiers (Day Pass, Credits, and Pro) support files up to 200 MB with no daily operation cap. There's no hard ceiling beyond 200 MB — the real limit is your device's available memory. Browsers typically allocate up to 2 GB to a single tab on modern computers, less on mobile. Files approaching the memory ceiling may slow down the browser or fail.

mdmundo works with the formats its tools convert between: Markdown (CommonMark and GitHub Flavored Markdown, including tables, task lists, fenced code blocks, and footnotes), HTML, Microsoft Word (.docx), CSV, and plain text. On the Markdown side it preserves headings, lists, links, images, blockquotes, inline and block code, tables, and YAML front matter. When converting to or from Word it maps headings, lists, bold and italic, links, tables, and images to the nearest equivalent; very heavily formatted Word documents (complex multi-column layouts, tracked changes, embedded objects) may need cleanup after conversion. CSV ↔ table conversion handles quoted fields, embedded commas, and custom delimiters.

Browser tabs have memory limits — typically 2 GB on desktop, 1 GB or less on mobile. Converting a very large document — say a long, image-heavy Word file — can require several gigabytes of working memory once it's parsed, decompressed, and held in browser memory during processing. For very large files, three alternatives work better than browser-only: desktop applications (which can write temporary files to disk), server-based tools (which have effectively unlimited memory), or splitting the file first with Split Markdown, then processing the pieces individually with mdmundo. This is an honest limit of the browser-only approach, not a bug.

Yes, for tools where it makes sense — Merge Markdown, Split Markdown, and similar tools accept multiple files in a single operation. Each file is still processed locally; batching is a UX convenience, not a server-side operation. Free tier users have a per-day operation cap (2 conversions per 24 hours); paid tiers have no daily cap.

Markdown files are plain text, so they carry no password or encryption of their own — you can open and process them directly. If you want to convert a document that is itself protected — for example a password-protected Word file — remove the protection in the app that created it before bringing it into mdmundo, since the tool needs to read the file's contents to convert it. mdmundo never asks for, stores, or transmits any password: like everything else, whatever you open is handled entirely on your own device.

The free tier gives you access to all 17 Markdown tools, up to 2 operations per day, with files up to 50 MB. No account needed. No ads. No watermarks added to your files. For most casual users — a few Markdown tasks a week — the free tier is genuinely all you need. Paid tiers exist for people who process files frequently, need larger file sizes, or want to support the project.

Four tiers cover different usage patterns: $1.99 day pass, $4.99 credits, $5.99/mo Pro, or $49/annual Pro annual. Day Pass is one batch of work, no commitment. Credits are 50 operations that never expire — good for occasional heavier use over weeks or months. Pro Monthly is regular professional use. Pro Yearly saves about 32% versus monthly billing. All paid tiers include files up to 200 MB and unlimited operations within their structure.

Payment is handled by Lemon Squeezy, which acts as our Merchant of Record: they process the transaction, calculate the VAT or sales tax for your country, and issue the invoice. Your card details are entered into Lemon Squeezy's checkout, not into mdmundo — we never see your card number. Lemon Squeezy supports major payment methods — credit and debit cards (Visa, Mastercard, American Express, Discover, and more), PayPal, Apple Pay, and Google Pay — across 130+ currencies and 135+ countries. One-time purchases (Day Pass, Credits) can also pay by bank debit (ACH); Pro subscriptions are billed via card, PayPal, Apple Pay, or Google Pay.

Yes. EU consumers have a 14-day right of withdrawal for digital services under EU consumer law. For other regions, refund requests are handled by Lemon Squeezy on a case-by-case basis. Email us at yourmundo@pm.me or contact Lemon Squeezy directly. Refunds for genuine product issues — a tool that didn't work for you — are generally granted without friction.

No, not for the free tier or Day Pass. Pro and Credits use an email-based license: you enter your email at checkout, Lemon Squeezy sends you a license key, you paste it into mdmundo to activate Pro features. There's no traditional account with a password to remember. This is a deliberate choice — fewer accounts means less data we hold about you.

Yes, for teams of 5 or more. Email yourmundo@pm.me to discuss. We support most arrangements: per-seat pricing, single-license-multi-user with reasonable use, and enterprise invoicing for larger organizations.