docfly.com レビュー 

Tras probar con varios convertidores en línea que decían que eran gratis y a la hora de descargar me requerían escoger un plan, docfly fue el único que me permitió tener el documento pdf rellenable al momento y sin pago. Permite hasta 3 documentos. Gracias!!

Advertises itself as free and then asks you to pay in the end after you spend the time to fill out your PDF

Watch out for the Lie. It pretends to be free and even tells you all over the landing page that you uploac, fill in, download.
What the don't tell you is that after all the effort of uploading and filling in, mine was a multi page document, it is NOT FREE. They hit you with a pay to download.
Don't use.

My experience with DocFly has been incredibly disappointing and feels like a classic bait and switch.

I used the site for the first time, completed a document, and was immediately prompted to pay—despite being told I had three free credits. When I attempted to sign in using my email addresses, I was unable to log in, which confirmed that I hadn’t used any credits before. So how were they already gone?

I reached out to DocFly and received a response from a representative named Emily. She claimed they were "seeing this issue for some users" and asked for detailed tech specs (browser, device, VPN use, etc.). I promptly responded with the requested information—Windows, Chrome, no AdBlocker, private Wi-Fi—and never heard back. Not a single follow-up. It’s been over a week.

This kind of lack of transparency and accountability feels deliberate. If the credits don’t work, and support goes silent after you reply, it raises major red flags.

Beware before using DocFly. They got my time but didn’t get my money—and they won’t get my trust.

—Gwen Vann

They title that their services are free and after you finish editing your document they refuse to export it and they ask you to pay to be able to export.
Don't say that it's free from the first place.

Funziona bene, come PDFGURU, ma non è gratuito. Attorno a 50€/anno per il livello più basic.