ThreadPDF vs M2PDF
M2PDF is the newest entrant in this category, positioned around fully-local PDF batch conversion. ThreadPDF matches the on-device story, exports more formats, and has no fixed batch cap.
Try ThreadPDF FreeTwo On-Device Tools, One With a Wider Surface
M2PDF is a newer Chrome extension with 427 users and a 4.1 average rating over 15 reviews. It is built around a clear positioning: convert up to 100 Gmail emails to PDF at a time, fully on the user's device, with attachments included.
ThreadPDF for Gmail is the same shape of product — on-device, in-Gmail floating UI, attachments alongside — with a wider output surface (PDF, HTML, and plain text) and no fixed batch cap per operation.
Because both tools share the on-device privacy model, the comparison comes down to format range, batch flexibility, free-tier framing, pricing transparency, and public Chrome Web Store footprint.
Quick Verdict
M2PDF and ThreadPDF agree on the most important thing — running locally, not uploading your emails. ThreadPDF goes wider on output formats and does not cap batch size at 100. M2PDF's tight "all features on free, 20 conversions to try it" framing is clean for one-off evaluators.
Choose ThreadPDF if you need HTML or plain-text export, plan to export more than 100 emails in a batch, or want transparent published pricing. Choose M2PDF if PDF is the only format you care about and 100-per-batch is plenty.
Feature Comparison
| Feature | Switch Labs | M2PDF |
|---|---|---|
| Paid price We Win | $4.99/mo or $49.99/yr | Pricing not publicly disclosed |
| Free tier We Win | 5 threads/day (recurring) | 20 lifetime conversions |
| Chrome Web Store users They Win | 3,500 | 427 |
| Rating / reviews They Win | 4.8 out of 5 (182 ratings) | 4.1/5 (15 reviews) |
| Output formats We Win | PDF, HTML, TXT | PDF only |
| On-device processing | ||
| Attachments included | Yes (ZIP bundle) | Yes (alongside PDFs) |
| Batch limit per operation We Win | No fixed cap | 100 emails per batch |
| Merge multiple emails into one PDF We Win | Yes, with TOC | |
| In-Gmail floating UI |
Detailed Comparison
Format Range
M2PDF is PDF-only. If you only ever export to PDF, that simplicity is a feature, not a limitation.
ThreadPDF exports to PDF, HTML, and plain text. HTML is useful for web-archive workflows where you want to keep the email rendering. Plain text is useful for searching, grepping, indexing, and feeding downstream tools.
If you have ever wished an export tool could give you something other than a PDF, that is the difference here.
Batch Size
M2PDF caps batches at 100 emails per operation. For most use cases that is plenty. For larger archive jobs — exporting a year of project correspondence, an entire mailbox before account closure, all client invoices for a tax year — it means breaking the job into multiple operations.
ThreadPDF does not enforce a fixed per-batch cap. Browser memory and Gmail's selection UI are the practical limits.
For one-off use, M2PDF's 100-cap is rarely a problem. For larger archival work, the cap is friction.
Free-Tier Framing
M2PDF gives 20 lifetime conversions on the free tier with all core features included. That is a clean "try the whole thing 20 times" framing — no feature-gating, no time pressure.
ThreadPDF gives 5 thread exports per day, recurring. Better for repeat use, slightly less generous on a one-off first impression.
If you are evaluating M2PDF for a single project and 20 conversions covers it, you might never pay. If you are a recurring user, ThreadPDF's daily allowance is more useful over time.
Privacy Parity
M2PDF and ThreadPDF both run the conversion in your browser. Neither sends your emails to a third-party server for processing.
On the privacy axis these two are essentially equivalent. The cloudHQ comparison hinges on this; the M2PDF comparison does not.
Public Footprint
M2PDF has 427 installs and 15 reviews on the Chrome Web Store. It is still small, but its public footprint is larger than ThreadPDF's today.
ThreadPDF has 3,500 users and 4.8 out of 5 (182 ratings). If you are choosing by social proof alone, M2PDF wins this row. If you care more about format range, batch flexibility, and transparent pricing, ThreadPDF is the wider tool.
Pros & Cons
Switch Labs
Pros
- Exports to PDF, HTML, and plain text (M2PDF is PDF-only)
- No fixed batch cap per operation
- Recurring daily free tier instead of 20 lifetime conversions
- Transparent flat pricing at $4.99/month
- On-device processing — same privacy story as M2PDF
- Combined PDF output with a table of contents
Cons
- Free tier is 5/day rather than 20-up-front
- Smaller Chrome Web Store footprint than M2PDF today
M2PDF
Pros
- Clean 20-conversion free tier with all core features included
- On-device processing
- Attachments delivered alongside the PDFs
- Narrower product surface — less to learn
Cons
- PDF-only — no HTML or plain-text export
- 100-email-per-batch cap
- Paid pricing not publicly disclosed
- No combined-PDF output
Which Should You Choose?
Choose ThreadPDF If You...
- Need HTML or plain-text export in addition to PDF
- Plan to export more than 100 emails in a single batch
- Use Gmail-to-PDF tools regularly (5/day, every day)
- Want pricing you can see before you install
Choose M2PDF If You...
- Only ever export to PDF — never HTML or plain text
- Never export more than 100 emails at a time
- Want to evaluate with 20 full-feature conversions up front
- Prefer a narrow, single-purpose tool
Frequently Asked Questions
Same Privacy Story, More Formats, No Batch Cap
Install ThreadPDF free from the Chrome Web Store. PDF, HTML, and plain-text export with attachments bundled in.
Try ThreadPDF Free