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

#webdev #javascript #productivity #showdev

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 expected

I knew signups were friction, but the feedback I've gotten since launching confirms people actively avoid tools that require them, even for completely free tiers.

2. "Free" needs to actually mean free

Ad-supported is fine. But hiding features behind a paywall while calling the product "free" breeds distrust fast. Every single tool on EazyStudio is fully functional with no locked features.

3. Performance is a feature

A tool that takes 3 seconds to respond feels broken, even if it works. I spent significant time optimizing load times — lazy imports, service workers for caching, pre-compiling WASM.

4. Solo building forces good scope discipline

When you're a one-person team, you can't build everything. I deliberately kept each tool minimal — do one thing, do it well, no feature creep.