/// EDIT
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Fill PDF Form API

Fill PDF forms by field name. Unknown fields are reported, never silently dropped.

/// Quick answer

Fill PDF Form sets each field you name to the value you give it, by field name — any name in your request that doesn't match a real field on the form comes back in unmatched instead of being silently ignored, and strict: true turns an unmatched field into a 422 instead. Checkboxes accept true, false, "Yes" or "Off". Set flatten: true to make the filled values permanent (non-editable) in the same call.

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How does the Fill PDF Form API work?

One HTTP request from any language. Every ASHDOCS endpoint uses the same X-API-Key header.

curl -X POST https://www.ashdocs.com/api/v2/tools/pdf-form-fill \
  -H "X-API-Key: ash_live_..." \
  -F "file=@form.pdf" \
  -F 'fields={"full_name":"Ada Lovelace"}' \
  -F 'flatten=true' \
  -F 'strict=false'

Common use cases

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