BuildPDF API vs DocStruct API

Two free Documents & Productivity APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose BuildPDF API if its data fits your use case better; on access and reliability it's level with DocStruct API.
Choose DocStruct API if you want to start without an API key, faster responses.

	BuildPDF API	DocStruct API
What it does	Convert HTML, images, and text to PDF.	AI extraction of invoices, receipts, bank statements & contracts into structured JSON/CSV.
Provider	BuildPDF API	DocStruct
API key	Required	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Online · 902 ms	Online · 190 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Convert HTML, images, and text to PDF.

Convert HTML, images, and docs to PDF with a simple REST API. 100 free conversions/month. No sign-up friction.

Strengths

AI extraction of invoices, receipts, bank statements & contracts into structured JSON/CSV.

One API call turns invoices, receipts, and statements into clean JSON/CSV. Free tier. Developer-first.

Strengths

Prototyping or a tutorial? Pick the one that needs no API key.
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

BuildPDF API requires an API key; DocStruct API doesn't, so DocStruct API is quicker to try.