I'm Sam. I'm a full-stack developer by trade and a tool builder by habit. Over the years I've probably built two dozen small web tools — some for work, some just because the existing options were frustrating. Formly is the one that stuck.
Formly runs 16 different format conversion engines — image formats (HEIC, WebP, PNG, JPG, SVG), document formats (PDF to images), and data formats (JSON, CSV) — all client-side. Your files never touch a server. The trade-off: some conversions that require heavy server-side processing (PDF to DOCX, video transcoding) aren't feasible in the browser yet. I'd rather be honest about what the tool can't do than build a server just to check a feature box.
I don't believe in "freemium" for basic utilities. Converting a file format isn't a premium feature — it's a basic computer operation that should've been built into every OS two decades ago. Formly is free, has no limits, and never will. The site is ad-supported. That's the entire business model. If the ads pay for the hosting, the tool stays up. If they don't, I'll pay the $5/month Cloudflare bill myself. It's not complicated.
I'm not a format specification expert. I'm a generalist developer who reads a lot of documentation, tests things empirically, and writes about what I learn. The blog posts here reflect that: practical, tested information from someone who actually uses these formats, not theoretical knowledge scraped from Wikipedia. If I get something wrong, email me and I'll fix it — the articles have dates on them for a reason.
[email protected] — I read everything, reply when I can.