What it does
Checks digital signatures embedded in a PDF file. The verification confirms whether each signature is valid and reports the signing identity.
Inputs and limits
- Input file: a signed PDF document (maximum 32 MB per request on the web app).
Web app
The page asks for a PDF file. After uploading the signed PDF, press Verify. The service returns a JSON result indicating whether the signatures are valid and lists their names.
Command line (CLI)
The CLI verifies signatures in a PDF placed in a task folder. Run the plugin with a task identifier, and it produces a verify_result.json file containing the verification status.
# Linux / macOS (needs the .NET 10 runtime and documentize.lic next to the DLL)
export PLUGIN_INPUT_DIR=./work/input
export PLUGIN_OUTPUT_DIR=./work/output
mkdir -p "$PLUGIN_INPUT_DIR/job1"
cp Sign_test.pdf "$PLUGIN_INPUT_DIR/job1/"
dotnet Documentize.VerifyESign.dll --task-id job1
ls "$PLUGIN_OUTPUT_DIR/job1"
# Windows PowerShell
$env:PLUGIN_INPUT_DIR = "$PWD\work\input"
$env:PLUGIN_OUTPUT_DIR = "$PWD\work\output"
New-Item -ItemType Directory -Force "$env:PLUGIN_INPUT_DIR\job1" | Out-Null
Copy-Item Sign_test.pdf "$env:PLUGIN_INPUT_DIR\job1\"
dotnet Documentize.VerifyESign.dll --task-id job1
Get-ChildItem "$env:PLUGIN_OUTPUT_DIR\job1"
Verified
Every code sample on this page was run on 2026-11-03 and its result was checked:
- Verify signatures via CLI with result check (CLI plugin): passed in 2 s