ThumbSprout
For Roblox creators

Thumbnails that grow your game.

ThumbSprout generates Roblox-style thumbnails, uploads the ones you approve, and uses your experience's real per-thumbnail analytics to decide what to keep and what to try next.

Start with free creditsExplore the demo

20 trial credits after email verification · no card required · no Roblox password, ever

Dashboard preview

Sample game · Game dashboard
Demo preview · sample data, not real analytics
Current leader · sample
Sample A
Supported by enough data
OBBY RUSHSAMPLE
QPTR (sample)
6.12%
Impressions
48,210
Avg session
11.4 min

Active set

4 of 5 slots · sample

OBBY RUSHSAMPLE
A
6.12%Enough data
DESERT DASHSAMPLE
B
5.38%Enough data
SPACE TYCOONSAMPLE
C
5.71%Gathering data
FARM LIFESAMPLE
D
4.49%Enough data

How it works

One loop, repeated on your schedule and inside your spending limits.

  1. 01

    Connect your game

    Add a scoped Roblox Open Cloud API key for your experience — user- or group-owned. We verify access with Roblox before marking it connected.

  2. 02

    Describe it

    Add your description, screenshots, characters and reference thumbnails, plus style notes and things to avoid.

  3. 03

    Generate candidates

    Authentic Roblox-style 1920×1080 concepts, variations and edits. You see the credit cost before anything runs.

  4. 04

    Approve & upload

    Approve manually (the default) or explicitly opt in to auto-publish. Roblox moderates every upload.

  5. 05

    Read real results

    Per-thumbnail impressions, qualified plays, QPTR, session length and winning segments from Roblox's own analytics.

  6. 06

    Grow

    Keep proven performers, try variations and fresh concepts on your schedule, within the budget you set.

Honest by design. Thumbnail tests are noisy. We show when a result is a current leader versus one supported by enough data, account for audience segments, and never invent analytics. No tool can guarantee a higher play-through rate — and we don't claim to.

Built to be safe with your game

  • Official APIs only

    Uploads, the active thumbnail set and analytics all go through Roblox Open Cloud. We never ask for your password or session cookie.

  • Encrypted credentials

    API keys are encrypted at rest on our servers, never sent back to your browser, and never written to logs. Disconnect deletes them.

  • You stay in control

    Manual approval is the default. Auto-publishing needs your explicit opt-in, keeps proven thumbnails, and can be paused or rolled back.

Pricing

Monthly plans with a fixed credit allowance — no unlimited tier. A standard image uses 2 credits; a high-quality image uses 5. Failed generations are refunded.

Starter

$19/mo
  • 1 connected game
  • 150 credits / month
  • Scheduled generation
  • Opt-in auto-publishing
Choose Starter

Pro

Most popular
$49/mo
  • 3 connected games
  • 600 credits / month
  • Scheduled generation
  • Opt-in auto-publishing
Choose Pro

Studio

$129/mo
  • 10 connected games
  • 1,800 credits / month
  • Everything in Pro
  • Higher concurrency
Choose Studio

Need more? Subscribers can buy top-ups (100 credits for $12). Subscription credits reset each billing period; top-up credits last 12 months.