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500 ToolBox vs 4XL Size

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

500 ToolBox compared with 4XL Size
Detail500 ToolBox logo 500 ToolBox4XL Size logo 4XL Size
What it doesFree online tools for images, PDF, video, text and more Size chart converter and comparison tool for large clothing sizes
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFreemium Free
PricingWebsite tools: free, no limits except fair daily limits on server-based tools. API: 50 free monthly credits plus 100 on the 1st of each month. Credit packs: Starter $5 (1,000 credits), Growth $25 (5,000 credits, 20% off), Scale $80 (25,000 credits). Not given
Key features
  • Image compression and resizing
  • PDF manipulation: merge, split, compress, convert to images
  • Video compression and conversion
  • AI background removal
  • Developer tools: JSON formatting, regex testing, JWT decoding
  • Text tools: word count, case conversion, diff checking
  • QR code generation and customization
  • Chrome extension with 50 tools
  • Server API with 30 endpoints and MCP integration
  • Business tools: invoice generator, password generator, calculators
  • Size chart lookup by brand (Nike, adidas, Strongsize, Calvin Klein, Tommy Hilfiger)
  • Measurement-based size finder for men and women
  • Size label conversion between US, UK and EU formats
  • Body measurement guide with step-by-step instructions
  • Comparison of the same size label across different brands
What makes it different
  • All tools are completely free with no signup required
  • Zero data retention: files stay private and never leave your device
  • Over 500 tools across 20+ categories
  • Most tools run in browser without uploading files
  • Progressive Web App with offline capability
  • Data sourced directly from official brand size charts with verified dates
  • Shows that the same label fits differently across brands
  • Measurements provided in both inches and centimeters
  • Separates men's and women's size lines to avoid confusion
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)21 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)90
Citation Flow (Majestic)165
Referring domains (Majestic)41

4 details filled in for both companies.

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