Simple tools for developers

A small collection of free, browser-based utilities. Your data never leaves your device.

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Base64 Encode & Decode

Convert text to Base64 and back. Supports Unicode and URL-safe mode.

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Password Generator

Strong, cryptographically secure passwords with customizable rules.

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Markdown Preview

Write Markdown with a live preview side-by-side. No signup required.

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DNS Dig

Look up DNS records (A, AAAA, MX, TXT, NS, CNAME) via DoH resolvers.

Why another tools site?

Most "online tools" ship megabytes of trackers, ads, or worse — they upload your data to a server. many-tool is different: every tool runs entirely in your browser. No accounts, no telemetry, no server round-trips for the actual work (with the exception of DNS Dig, which queries public DoH resolvers directly from your browser).

What's inside

Base64 — encode/decode text, with UTF-8 safety and URL-safe variant.
Password Generator — uses crypto.getRandomValues() for true randomness.
Markdown Preview — lightweight, CommonMark-ish parser, no external dependencies.
DNS Dig — queries Cloudflare or Google DoH endpoints over HTTPS.

Privacy

No cookies, no analytics, no JavaScript loaded from third parties (except where noted). The source is plain HTML, CSS, and JavaScript — you can view it with View Source in any browser.