Credits

The Tools.FAST network uses a unified credit system. One credit wallet powers every tool -- Convert.FAST, Compress.FAST, and all future tools. Credits are deducted when you submit a job and automatically refunded if the job fails.

How credits work

1. Deducted at submission. When you POST a file, credits are deducted immediately based on the job type and file characteristics.
2. Refunded on failure. If a job fails during processing, credits are returned automatically.
3. Shared wallet. Your credit balance is the same across all Tools.FAST tools. Converting a file on Convert.FAST and compressing a file on Compress.FAST both draw from the same pool.

Tiers

Guest tier

No account required. You get 100 daily credits that reset at midnight UTC. Suitable for trying out the service.

Free tier

Create a free account at accounts.tools.fast to get:

• 500 bonus wallet credits on signup (one-time, never expire)
• 100 daily credits that reset at midnight UTC

Wallet credits are consumed first, then daily credits. This means your first 500 operations are effectively free with no daily cap.

Pro tier

Subscribe at accounts.tools.fast for:

• 12,000 credits/month per seat (base)
• Additional seats at volume discounts ($5/seat for 2-10, scaling down to $1/seat for 51+)
• 1 GB max file size
• 1,000 files per batch
• 6 parallel jobs
• Unused credits roll over (capped at your monthly allocation)

Pay as you go credits

Need more credits without a subscription? Purchase credits as a one-time top-up:

• 500 credits per dollar (base rate)
• 20% bonus on purchases of $10 or more (6,000 credits for $10)
• 50% bonus on purchases of $20 or more (15,000 credits for $20)
• Minimum purchase: $5
• Maximum purchase: $250
• Pay as you go credits never expire

Purchase credits at accounts.tools.fast.

Credit costs

Credit costs vary by operation type and complexity:

Costing strategies

Most image and audio conversions cost 1 credit. Document conversions involving OCR or multi-page processing cost more. Check each tool's API docs for specific costs:

• Convert.FAST pricing -- Per-converter credit costs
• Compress.FAST pricing -- Per-compressor credit costs

Cost estimation

Convert.FAST provides a cost estimation endpoint so you can check the cost before submitting:

curl -sS "https://api.tools.fast/convert/estimate/pdf/jpg?fileSizeBytes=5242880&pageCount=12" \
  -H "X-Fast-Api-Key: $API_KEY"

Invoke-RestMethod "https://api.tools.fast/convert/estimate/pdf/jpg?fileSizeBytes=5242880&pageCount=12" `
  -Headers @{ "X-Fast-Api-Key" = $env:API_KEY }

{
  "creditCost": 12,
  "costingStrategy": "PerPage",
  "breakdown": "1 credit x 12 pages"
}

Monthly credit refresh

Pro subscribers receive their full credit allocation on each billing cycle. Credits that were not used carry over, up to a cap equal to your monthly allocation (e.g., 12,000 monthly credits means a maximum rollover balance of 12,000).

Checking your balance

Query your current credit balance from any tool in the network:

curl -sS "https://api.tools.fast/convert/entitlements/me" \
  -H "X-Fast-Api-Key: $API_KEY"

Invoke-RestMethod "https://api.tools.fast/convert/entitlements/me" `
  -Headers @{ "X-Fast-Api-Key" = $env:API_KEY }

Pro account response

{
  "planId": "pro",
  "planName": "Pro",
  "tier": "pro",
  "totalCredits": 11847
}

Free account response

{
  "planId": "free",
  "planName": "Free",
  "tier": "free",
  "totalCredits": 342,
  "dailyLimit": 100,
  "dailyUsed": 15,
  "resetDate": "2026-02-21"
}

Guest response (no API key)

{
  "planId": "guest",
  "planName": "Guest",
  "tier": "guest",
  "totalCredits": 100,
  "dailyLimit": 100,
  "dailyUsed": 0,
  "resetDate": "2026-02-21"
}

Credit deduction errors

If you don't have enough credits, the API returns 402:

{
  "error": "entitlements.insufficient_credits",
  "detail": "Insufficient credits. Required: 5, Available: 2"
}

For free and guest tiers, exceeding the daily limit returns:

{
  "error": "usage.daily_limit_exceeded",
  "detail": "Daily usage limit exceeded. Used: 100/100"
}