Test a chat analyzer before choosing your own conversation
These sample WhatsApp, Telegram and Instagram exports have known message counts. Download a file, open it in a compatible analyzer and check the result. Every name, identifier and message is fictional.
Download all sample files and expected results · Expected results as JSON
Choose a sample export
The small files represent the same four-person conversation in different formats. The large WhatsApp files represent a separate 20,000-message conversation. Import one case at a time. For the Instagram case, select both parts together.
| Sample | Download | All years | 2026 only |
|---|---|---|---|
| WhatsApp iPhone format | Small TXT | 32 messages | 16 messages |
| WhatsApp Android format | Small TXT | 32 messages | 16 messages |
| WhatsApp iPhone format, large | Large TXT | 20,000 messages | 18,560 messages |
| WhatsApp Android format, large | Large TXT | 20,000 messages | 18,560 messages |
| Telegram rich-text JSON | result.json sample | 32 messages | 16 messages |
| Instagram, one conversation in two parts | Part 1 + Part 2 | 32 messages together | 16 messages |
These are constructed examples of export formats, not files captured from real messaging accounts. They contain Unicode text, emoji and multiline messages. They do not contain photos, voice notes, deleted-message notices or every date format an app can export.
How to check the result
- Download a supported sample and open your chosen analyzer. In the Tera Chat analyzer, use “Choose your chat export” to select the TXT or JSON file. Select both Instagram parts for that case.
- Choose All years first. A tool that defaults to the latest year may show a smaller, correct count for that selection.
- Check the total and the four senders: Nora, Arun, Léa and Kai. Each has eight messages in a small case or 5,000 in a large case.
- If the tool has a year filter, choose 2026 and compare with the table. These expected year boundaries use UTC. Telegram and Instagram contain absolute timestamps; a tool using another local time zone can put messages near midnight into a different calendar year.
- Check that a continuation line has not become a separate message. Small cases have five multiline messages; large cases have 2,858. A viewer can also check the complete first and last messages in the expected-results file.
All small cases start at 00:00 UTC on 30 December 2025 and end at 21:00 UTC on 2 January 2026. The large cases end at 18:38 UTC on 26 January 2026. WhatsApp text dates are day/month/year; their timestamps have no time-zone offset.
Tera Chat's recorded result
On 2 November 2026, Tera's public parser and analyzer matched the expected values in all six cases: total messages, messages per sender, yearly counts, multiline-message counts, and the full first and last message. This was a Node execution of the same JavaScript file served by the website. It was not a browser or phone performance test.
The expected values were calculated from the fictional source records before invoking Tera's parser. The recorded results include actual values, the test time and the source SHA-256. The reproduction script and instructions are also in the ZIP.
Published by Tera Chat, the tool being tested. These results are not an independent review or a ranking against other products. No competitor parsing result is reported here.
What a passing result tells you
It shows that the tested code read these particular files as expected. It does not prove every export will parse correctly, establish a file-size limit, verify local-only processing, or validate the meaning of reply-time and relationship statistics. There is no speed or device-memory benchmark here.
For a fair comparison, give each tool a format it supports and record its selected year. Mark a blocked import as unavailable, not a parsing failure. A correct count cannot recover messages omitted from the original export. In a group, consecutive messages from different senders do not establish who replied to whom.
For a separate, fully explained timing example, see how median reply times are calculated. To read a WhatsApp export as a conversation, use the chat viewer.
Test collection v1 · Published by Tera Chat · 2 November 2026 · Fictional data only.