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Undertone vs ThumbBlitz

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

Undertone compared with ThumbBlitz
DetailUndertone logo UndertoneThumbBlitz logo ThumbBlitz
What it doesSee why colors work Free browser-based Roblox thumbnail maker with no sign-up, no watermark, no AI generation
StageNot given Startup
FoundedNot given 2026
Based inNot given Not given
Pricing modelFreemium Not given
PricingFree: Original view, Temperature map, Value structure, Saturation map, Palette and Harmony for every image, 20 analyses at a time. Lifetime Premium: one-time purchase includes Composition guides, Contrast map, tinted value bands, unlimited history, full-res export. No subscription. Free: 3 watermark-free exports a day, no account required. Pro: $4.99/month or $29/year (or $49 lifetime) for unlimited exports and batch export of all sizes at once.
Key features
  • Palette with proportions showing dominant colors sized by image weight
  • Color harmony identification (Complementary, Analogous, Triadic, Split-complementary, Tetradic, Square, Monochromatic)
  • Temperature map showing warm and cool distribution across image
  • Value structure divided into clear zones (light, mid-tone, dark)
  • Saturation map showing vivid and muted areas
  • Composition guides identifying classic guides like golden ratio and rule of thirds
  • Contrast map showing where the eye lands first (Premium)
  • Painter-friendly color names (Yellow Ochre, Payne's Gray, etc.)
  • Local device processing with no image uploads
  • Works offline with no account required
  • Upload and edit screenshots locally in browser without uploading to server
  • Add bold headline text with outline and shadow effects
  • Drag-and-drop sticker overlay system
  • Export at multiple sizes: 1920×1080, 1280×720, 512×512
  • 8 headline text styles and 38 backdrop presets
  • Support for PNG, JPG and WEBP file formats
  • Export as clean PNG with no watermark or branding
  • Pro plan enables batch export of all sizes in one click
  • 22 free template presets for quick start
What makes it different
  • Shows color proportions, not just colors, recognizing that a 60/5 split is fundamentally different from 50/50
  • Four layers of analysis together show relationships single layers cannot reveal
  • Built by people who actually mix paint with painter-friendly vocabulary
  • Lifetime Premium with single payment, no subscription model
  • All data stays on device, no account signup required
  • No account or sign-up required—open the page and start immediately
  • Never uploads your files to a server—all processing happens on your device
  • Not AI-generated—uses your actual screenshot, not synthesized imagery
  • Three free watermark-free exports daily on the free plan
  • Works on any device with a browser—no installation or updates needed
Community votes00
DR (Domain Rating by Ahrefs)8 +1 (up) since last check6 no change since last check
Trust Flow (Majestic)47
Citation Flow (Majestic)3215
Referring domains (Majestic)317

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