- ✓ Unit Converter
- ✓ Color Converter
- ✓ Password Generator
- ✓ UUID Generator
- ✓ Random Number Generator
- ✓ Hash Generator
- ✓ QR Code Generator
- ✓ Barcode Generator
- ✓ Color Palette Generator
- ✓ Gradient Generator
- ✓ Flexbox & Grid Generator
- ✓ Box Shadow Generator
- ✓ Border Radius Generator
- ✓ SVG Blob Generator
- ✓ Avatar Generator
- ✓ Favicon Generator
- ✓ Word Counter
- ✓ JSON Formatter
- ✓ Meta Tag Generator
- ✓ Fancy Text Generator
- ✓ ASCII Art Generator
- ✓ Lorem Ipsum Generator
- ✓ Regex Tester
- ✓ SQL Formatter
- ✓ JSON ↔ CSV Converter
- ✓ Business Name Generator
- ✓ Domain Name Generator
- ✓ Invoice Generator
- ✓ GST Invoice Generator
- ✓ Expense Tracker
- ✓ Cover Letter Generator
- ✓ ATS Resume Builder
- ✓ PDF Merge
- ✓ PDF Split
- ✓ PDF Rotate
- ✓ PDF Extract Pages
- ✓ Images to PDF
- ✓ PDF Page Numbering
- ✓ PDF Watermark
- ✓ Compress PDF (basic)
Interview Prep Question Bank
Curated common interview questions by role — static content, no AI needed.
Portfolio Site Template Generator
Fill in your details, get a downloadable single-page HTML portfolio.
Timesheet / Hours Tracker
Same local-storage pattern as the Expense Tracker, for freelancers billing by the hour.
Markdown Previewer
Paste Markdown, see rendered HTML live — same pattern as JSON Formatter.
Quotation Generator
Same engine as Invoice Generator, framed for pre-sale quotes instead of billed work.
PDF to Images
The reverse of Images to PDF — render each page as a downloadable PNG using PDF.js.
PDF OCR (scanned → editable text)
Needs a trained text-recognition model. Real OCR libraries exist for the browser (e.g. Tesseract.js) but are heavy and slow for large documents — a realistic 'maybe later', not a quick add.
PDF eSignatures
Carries real legal/compliance weight (signature verification, audit trails) — not a weekend build, and mistakes here have real consequences.
AI Image Tools
Background removal, upscaling, and generation need GPU inference per request — real cost per visitor whether or not they click an ad.
AI Writing Tools
Same issue: every generation costs you API money. Ad revenue per visitor rarely covers that.
Video Tools
Compression/enhancement/subtitles need serious server-side processing power — not static-site territory.
SEO Tools (Ahrefs/SEMrush-style)
These are valuable because of years of crawled web data. Not something one person can replicate.
Marketing/Ad-copy AI Tools
Same API-cost problem as AI writing — needs a subscription model, not ads.
Why the split matters
- Every tool above the line runs entirely in the visitor's browser — zero marginal cost per use, which is what makes an ad-supported free tool sustainable.
- Everything below the line costs money per use (GPU inference, API calls, data licensing, or real legal risk) regardless of whether that visitor ever clicks an ad. That's a different business than what's here.
- The Documents tools use a library called pdf-lib, which manipulates PDF structure (pages, rotation, text overlay) entirely client-side — that's why merge/split/rotate/watermark were realistic to add, while OCR and eSignatures still aren't.