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Blink PDF offers four plans, from your first proof-of-concept to millions of documents per month. Every plan ships with the same core rendering quality — the same Markdown engine, PDF/UA-1 accessibility, bundled fonts, and 15 curated themes. The only differences are volume, throughput, the free-tier watermark, and support tier.

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How Billing Works: Render Units

Usage is metered in render units, not raw request count. A render costs:
  • A text-only render costs 1 unit.
  • Image-heavy renders cost more, up to a hard ceiling of 16 units per render.
  • Images with the same content hash within a render are counted once.
A single image larger than 24 megapixels, or more than 48 megapixels of images in one render, is rejected with 422 image_too_large before decoding.

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Plans at a Glance

Annual billing is 10 months prepaid — roughly 17% off (about two months free) compared to paying month-to-month.

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Plan Details

Free

$0 / month
  • 250 render units per month
  • “Made with Blink PDF” watermark on every PDF
  • Full theme catalog and typography
  • Community support
  • 10 requests / min, 1 concurrent
  • 128 KB max input

Pro

**9/month∗∗⋅or9 / month** · or 90 / year (~17% off)
  • 30,000 render units per month
  • $0.004 per extra unit
  • No watermark
  • Per-key usage attribution
  • 120 requests / min, 10 concurrent
  • 2 MB max input · configurable spend cap

Business

**79/month∗∗⋅or79 / month** · or 790 / year (~17% off)
  • 1,000,000 render units per month
  • $0.001 per extra unit
  • No watermark
  • Slack support channel
  • 600 requests / min, 40 concurrent
  • 5 MB max input · configurable spend cap

Enterprise

Custom pricing
  • Dedicated capacity, no per-render metering
  • Custom rate limits and uptime commitments
  • Custom templates and branding
  • On-premise / VPC deployment
  • Contact us

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Included in Every Plan

No matter which plan you choose, every Blink PDF render includes:
  • Markdown rendering — clean, spec-compliant conversion from Markdown to PDF
  • PDF/UA-1 accessibility — documents pass screen-reader and assistive-technology checks out of the box
  • 15 curated themes — the full theme catalog is identical on every plan
  • Bundled fonts + Google Fonts — six hosted font families plus any Google Fonts family by URL
  • Color emoji (COLR/CPAL) — full-color emoji rendered crisply at any size
  • ToUnicode mapping — text in your PDFs is always copy-pasteable and searchable
  • Font subsetting — only the glyphs you actually use are embedded, keeping file sizes small
  • 24-hour retention — your Markdown input is processed in memory and never persisted; rendered PDFs and download links live at most 24 hours, then are purged. See Zero Retention.

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How Usage Counting Works

Only successful renders consume render units. Failed requests, validation calls, and retries that end in an error do not consume units. The authoritative per-response signal is the X-BlinkPDF-Billing header.
Every successful POST /v1/render or POST /v1/templates/*/render reports its billing outcome in X-BlinkPDF-Billing:
  • counted — the render was billed against your period’s render units (template routes always bill 1 unit when counted).
  • deduped-cache — an identical render was replayed from cache and not billed (POST /v1/render only; templates do not use the process-local PDF LRU).
  • deduped-idempotent — a reused x-idempotency-key suppressed the charge on a re-render (POST /v1/render only; templates do not accept client idempotency keys).
Template routes share the same spend-cap, tier rate/concurrency, usage ledger, and free-tier watermark path as POST /v1/render. The following calls are always free and never consume render units:
  • GET /health and other health checks
  • POST /v1/render/validate (dry-run validation — though it has its own rate limit)
  • Font, theme, and style-target catalog listings

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Overage & Spending Caps

Once you pass your plan’s included render units, additional units are billed at the per-unit overage rate through Stripe metered billing. Overage is soft — you are never abruptly cut off, and you are never surprise-charged. Each paid tier also has a hard cap at 2× its included volume (60,000 units for Pro, 2,000,000 for Business). Reaching the hard cap returns 402 spend_cap_reached and pauses billing until the next period.
On Pro and Business plans you can set a configurable monthly spending cap below the hard cap. When you hit it, the API returns a clear 402 error rather than continuing to bill — useful for keeping side projects and internal tools within a fixed budget.

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Annual Billing

Choosing annual billing prepays 10 months for a full year of allowance — roughly 17% savings (~2 months free) versus monthly. The annual base is charged upfront as a single payment; your monthly render-unit allowance rolls each period. Any overage beyond your included units is still invoiced monthly as you use it.

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Need dedicated capacity, higher limits, or on-premise deployment? We’d love to hear from you.