Top Tools for HLP to RTF Conversion in 2025Legacy HLP (Windows Help) files are still encountered in archives, old documentation repositories, and software distributions. Converting HLP to RTF (Rich Text Format) makes content editable, searchable, and portable — ideal for migrating documentation into modern help systems, wikis, or word processors. This article walks through the best tools for HLP→RTF conversion in 2025, how they compare, practical tips for use, and a suggested workflow for clean, reliable migrations.
Why convert HLP to RTF?
- Preserve editable content: RTF is widely supported by word processors (Word, LibreOffice) so teams can update text directly.
- Maintain formatting: Good converters retain headings, lists, bold/italic styles, and basic layout.
- Facilitate indexing & search: RTF converts into searchable text for documentation systems and intranet search.
- Simplify migration: RTF is an intermediary format that’s easy to import into modern help authoring tools or CMS.
What to expect from a converter
A practical HLP→RTF conversion tool should:
- Extract text accurately, including special characters and code samples.
- Preserve basic formatting (headings, lists, bold/italic).
- Export images and link references (either embedded or as separate files).
- Support batch processing for many HLP files.
- Provide error reporting and logs for troubleshooting.
Top tools in 2025
Below are the leading tools, covering open-source utilities, commercial desktop apps, and command-line utilities useful for scripted migrations.
- HLP Decompiler (hlpdecomp / helpdecompiler)
- Overview: A focused decompiler that extracts HLP contents, producing RTF files and assets. Many forks and maintained variants exist.
- Strengths: Accurate extraction, preserves formatting and images, has batch support.
- Use case: Ideal when you need faithful, per-topic RTF outputs with accompanying image files.
- Help Workshop + third-party utilities
- Overview: Microsoft Help Workshop historically compiles HLP files; used alongside tools that reverse the process or extract source RTF/RTF-like content.
- Strengths: Familiar Windows GUI for some workflows; some third-party tools integrate to generate RTF.
- Use case: Teams on Windows who maintain legacy toolchains and prefer GUI-driven work.
- FAR Manager plugins / Total Commander plugins
- Overview: File-manager plugins that can peek into HLP files and extract content into text/RTF.
- Strengths: Good for quick, ad-hoc extraction without installing heavier software.
- Use case: Power users who want quick access to content during audits.
- HelpLib/Python scripts (open-source)
- Overview: Python libraries and scripts that parse HLP internals and export RTF or plain text. Examples include community projects on GitHub updated to 2025.
- Strengths: Scriptable, customizable, integrates into automation pipelines.
- Use case: CI/CD or batch migrations where you need control over output formatting.
- Commercial converters and documentation migration services
- Overview: Paid tools/service providers that handle HLP conversion as part of larger documentation modernization.
- Strengths: Turnkey, can handle edge cases, provide QA and post-conversion cleanup.
- Use case: Large organizations migrating thousands of topics and wanting guaranteed accuracy.
Comparison table
Tool / Category | Ease of Use | Batch Support | Formatting Preservation | Images & Links | Best for |
---|---|---|---|---|---|
HLP Decompiler (hlpdecomp) | Medium | Yes | High | Yes | Faithful, per-topic extraction |
Help Workshop + 3rd-party | Medium | Limited | Medium | Partial | Legacy Windows workflows |
File-manager plugins | Easy | No | Low–Medium | Sometimes | Quick ad-hoc extraction |
Python scripts / libs | Medium–Hard | Yes | Variable | Variable | Automated/custom pipelines |
Commercial converters/services | Easy | Yes | High | Yes | Enterprise migrations |
Practical workflow for reliable conversions
- Inventory and backup: Gather all HLP files, back them up, and note sizes and timestamps.
- Test on samples: Pick representative HLP files (small, complex, with images) and run them through two different tools to compare outputs.
- Automate batch jobs: Use decompiler or scripts to process folders, exporting RTF and gathering images into parallel directories.
- Validate content: Open RTF files in Word or LibreOffice to check headings, lists, tables, and special characters.
- Post-process cleanup: Use find/replace, scripts, or macros to fix recurring formatting issues (broken links, incorrect encodings).
- Import into target system: Convert RTF to the target format (HTML, Markdown, CMS) if needed, using converters that preserve structure.
- QA and publish: Run reviews, fix remaining issues, and publish.
Tips for cleaner results
- Convert using UTF-8-aware tools when possible to avoid character encoding issues.
- If images are missing, inspect the HLP asset extraction — some tools output images separately; others embed them in RTF.
- Use sample-driven QA early to identify systematic problems (e.g., all code blocks losing formatting).
- For very old HLP files, try multiple tools — some handle legacy compression/encoding better.
Troubleshooting common problems
- Missing images: Look for an “assets” folder from the extractor or re-run with an option to dump binary resources.
- Garbled characters: Try forcing a different codepage or using a modern script that normalizes to UTF-8.
- Structural errors (missing headings): Use a converter that outputs per-topic RTF; combine with a parser script to rebuild structure.
When to hire a service
Consider paid conversion services if:
- You have thousands of HLP topics and tight deadlines.
- Documentation is critical (legal, regulatory) and must retain exact formatting.
- You need migration plus restructuring (taxonomy, metadata tagging, indexing).
Final notes
Converting HLP to RTF is often a necessary step in modernizing legacy documentation. In 2025, a mix of well-maintained open-source decompilers, scriptable libraries, and a few commercial offerings can cover almost any scale of migration. Test, automate, and validate — and use RTF as a flexible intermediary for final publishing to modern formats.