I built a client-side trade document validator — no upload, no server, just the

<p>The problem I kept running into: a financial report where a subtotal on page 8 is wrong, but nobody spots it until the numbers get aggregated into a spreadsheet and something

<p>Hey DEV community! 👋</p> <p>As a developer and digital marketer, I got sick of using random, ad-stuffed websites every time I needed to quickly format JSON, calculate a margin,

<p>MergePDF is a 100% client-side PDF tool. No backend, no uploads, no sign-up. Here's the architecture, the tricky parts, and why privacy is a feature, not a setting.<br /> Every

<p>As developers, we all have that exact same workflow. You get a massive blob of JSON from an API, or a JWT token from a staging environment, and you instinctively Google "JSON

<p><strong>The scene:</strong> Friday evening. You're on page 147 of a 200-page procurement spec. Clause 17.3 says "mandatory: Cyber Essentials Plus certification." Your draft

<div class="highlight js-code-highlight"> <pre class="highlight markdown"><code>privacy webdevEvery time I uploaded a file to an online PDF tool, I wondered: what happens to it

<p>If you have ever written <code>canvas.toBlob(callback, 'image/avif')</code>, there is a good chance your users have been downloading PNG files with an <code>.avif</code>

<p>A year ago I was rebuilding the same <code>&lt;PhoneInput&gt;</code> for the third time across three different projects. Each time I reached for