Why Client-Side PDF Tools Matter for Devs

<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>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>Last year I needed to merge two PDFs before sending them to my landlord. I Googled "merge PDF online," clicked the first result, and uploaded my lease agreement and bank

<p>A few years ago, almost every "online tool" worked the same way: you upload your file to a server, wait for a response, then download the result. Simple, but it has real costs

<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,

<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

<h2> The Problem with Most Online Formatters </h2> <p>You know the drill. You paste some JSON into a random online formatter, or convert a CSV to Markdown, or format a WeChat

<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