PDF Toolbox
Merge, split, organize, convert, protect and optimize PDF files locally on Windows.
Small Windows tools for everyday jobs.
ALMARFELD is an independent software project with eleven Windows utilities for comparing files, generating code, inspecting metadata, editing subtitles, checking configuration files, diagnosing CSV files, inspecting signed containers, working with PDFs locally, reviewing application leftovers, checking certificates offline and translating video subtitles.
Windows · Free and open source
Practical Windows guides → Check downloads, understand file problems and review changes before applying them.
Software
All software →FolderWatch
Create a folder snapshot and compare it later to see which files were added, removed or changed.
API Model Forge
Paste JSON and generate typed models for C#, TypeScript, Kotlin, Python or Go.
MetaClean
Inspect file metadata and remove selected fields from supported images and PDFs before sharing.
Practical guides
Step-by-step explanations for common file problems, with verification steps and the limits worth knowing.
Signed documents
How to Open and Inspect a P7S File on Windows
Identify attached and detached P7S signatures, inspect signers, extract embedded content and interpret integrity and trust results separately.
File privacy
How to Check EXIF and GPS Metadata in Photos on Windows
Review location, device, capture-time and software metadata before sharing a photo, then decide what actually needs to be removed.
Data files
How to Fix CSV Delimiter and Encoding Problems on Windows
Recognize comma, semicolon, tab and pipe confusion, distinguish encoding problems from structural errors, and export a reviewed copy safely.
PDF workflows
How to Protect or Unlock a PDF Offline on Windows
Create a protected copy, understand owner and user credentials, review restrictions, and keep the original while testing the exported document.
Certificates
How to Inspect a Certificate Chain on Windows
Review leaf, intermediate and root certificates, distinguish a provided chain from system trust, and recognize expiry or signature problems.
Developer workflows
How to Compare .env and Configuration Files Without Exposing Secrets
Compare keys, types and references across environments while keeping values masked, then export a reviewable report or .env.example safely.
Support ALMARFELD
ALMARFELD software is free to use. If these tools save you time, you can support continued development.
Helpful bug reports and feedback also make a difference. Get in touch →
About ALMARFELD
ALMARFELD publishes small, practical Windows utilities and detailed guides for the workflows around them. The current applications are free and open source, with local workflows and no ALMARFELD accounts or telemetry. SubFlow also offers optional cloud translation, which sends subtitle text only after consent.
Read how the project documents testing, limitations and corrections.
Contact ALMARFELD at [email protected].
Source code
All eleven applications have public GitHub repositories under the MIT license. Release notes and bug reports are there too.