I built 80+ free browser tools — no signup, no ads, no paywalls (here's what I learned)

A few months ago I got frustrated. I needed to compress a PDF quickly. Found a tool online — it asked me to create an account first. Found another — it had so many ads the actual button was invisible. Found a third — it uploaded my file to their servers and I had no idea what happened to it after. I thought: this shouldn't be this hard. So I built EazyStudio — a suite of 80+ browser-based tools where everything runs 100% in your browser, no signup, no intrusive ads, no files ever leaving your device. What's inside Here's a snapshot of what's available: PDF tools Compress, merge, split, rotate PDFs PDF to Word, Excel, JPG and back Add watermarks, protect with passwords Image tools Background remover (runs locally in browser) Image compressor, resizer, converter AI image upscaler Color palette extractor, color picker Developer utilities JSON formatter/validator Base64 encode/decode URL encoder, HTML entity converter Regex tester JWT decoder API tester (Postman-lite) CSS gradient generator, box shadow generator Finance & math EMI calculator, SIP calculator GST calculator, compound interest, tip splitter Unit converters (length, weight, temperature, data) And more QR code generator Password generator Text tools (word counter, case converter, lorem ipsum) Device preview tool The technical approach: browser-first The biggest design decision was: nothing gets uploaded to a server. For PDF operations I use PDF.js and pdf-lib running in the browser. For image tools it's canvas + WebAssembly (WASM) modules. For background removal I'm using a WASM-based segmentation model that loads client-side. This has three benefits: Speed — no upload round-trip, works on large files instantly Privacy — your files never touch my server Cost — zero storage, zero egress bandwidth The downside: WASM modules add initial load time. I worked around this with lazy-loading — the WASM only loads when you first use that specific tool. What I learned building this 1. People hate signups more than I ex