Chat to Evidence

Preparing WhatsApp messages as evidence for an HR complaint or tribunal

Updated

Workplace harassment often plays out over WhatsApp, whether it’s a team group chat, a manager’s direct messages, or a personal chat that turned inappropriate. When you raise it with HR, or take it to an employment tribunal, a clean chronological record matters — investigators and tribunals need to see what was said, by whom, and exactly when, without wading through a phone’s scroll history.

Chat to Evidence converts the export into a dated, page-numbered PDF in your browser. The file is never uploaded, which matters for something this sensitive — you control the copies you hand to HR or a lawyer.

Why a chronology matters in a workplace complaint

HR investigators and tribunals are usually trying to establish a pattern over time — was this a one-off, or a pattern of conduct that escalated. A jumbled set of screenshots, often taken in the moment and out of order, makes that harder to see. A single PDF with every message in order, each with its exact timestamp, lets a reader follow the sequence and judge for themselves whether it shows a pattern.

It also protects you: a complete, ordered transcript is harder to dismiss as selective than a handful of screenshots, because it shows the full conversation rather than a curated excerpt.

Redacting phone numbers before you share it

You’ll often need to hand this PDF to HR, a union representative, or an employment lawyer, and sometimes to a wider group during an investigation. The Case Pass includes a redaction option that masks phone numbers in the transcript, so you can share a copy without exposing personal numbers unnecessarily, while the message content itself stays intact.

Keep the original export file

Whatever you do with the PDF, keep the original .txt or .zip export from WhatsApp somewhere safe. If the matter is disputed, or if the case moves to a tribunal, you may be asked to produce the source file or demonstrate that the PDF wasn’t altered. The Case Pass certification page records the SHA-256 hash of the export file you generated the PDF from, which lets you (or an investigator) later confirm the PDF matches that exact source file — but that only works if you still have the original file to compare it against.

Filtering to the relevant period

Work chats often mix ordinary business messages with the ones that matter to your complaint. You can generate a full unfiltered transcript for context, or use the date-range filter to produce a focused exhibit covering just the period the complaint concerns — for instance, from the first inappropriate message through the most recent one. Some people prepare both: a full transcript kept privately and a filtered exhibit to submit with the complaint.

Building the PDF

  1. Export the relevant WhatsApp chat or group — see the iPhone and Android guides.
  2. Open chattoevidence.com and drop the .txt or .zip file in. Processing happens on your device.
  3. Set a date range if you want a focused excerpt, and turn on phone-number redaction if you plan to share the file with HR or beyond.
  4. Generate the PDF with the Case Pass for the full transcript with no watermark, page numbers and a certification page.
  5. Save the PDF alongside the original export file, and note down where and how you’re storing both, in case you need to produce them later.

Frequently asked

Is this a substitute for legal advice on my situation?

No. This tool only converts your WhatsApp export into a PDF; it doesn’t assess your complaint or tell you what your employer’s policy or local employment law requires. Speak with HR, a union representative or an employment lawyer about how to proceed, since rules vary and change.

Should I redact phone numbers before submitting to HR?

Many people do, particularly if the PDF will be seen by more people than strictly necessary. The Case Pass includes a redaction option for this, though whether it’s appropriate depends on your situation.

Will HR or a tribunal accept a generated PDF as evidence?

That depends on the process and the rules that apply, which this tool can’t determine for you. Keeping the original export file alongside the PDF, and having the certification page’s hash to verify against it, helps if authenticity is ever questioned.

Can I include an entire group chat, not just direct messages?

Yes, WhatsApp lets you export group chats the same way as one-on-one chats, and the PDF will show each sender’s name on their messages.

Chat to Evidence is a document-formatting tool, not a law firm. Nothing on this page is legal advice; rules and app menus change, so check current official guidance.