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I built DocDiff – a simple way to compare PDFs, DOCX, and TXT files

I just launched a small tool called DocDiff.

It lets you upload two documents (PDF, DOCX, or TXT) and clearly see what changed using color-coded diffs. I built it because reviewing document changes usually means heavy software, accounts, or manual scanning, and I wanted something faster and simpler.

It’s intentionally small:

- no accounts

- upload two files

- see what changed

- export if needed

I’m charging a one-time $5 for Pro access to validate if this is useful.

I’d really appreciate honest feedback:

- Is the use case clear?

- Would you trust a tool like this for real work?

- Is there something important missing?

Link: https://www.docdiff.co/compare-pdf-online?utm_source=indiehackers&utm_medium=post&utm_campaign=launch

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DocDiff
  1. 1

    Congrats on the launch, looks solid. How are you currently thinking about acquiring early users and gathering feedback?

    1. 1

      Thanks! Right now I'm validating demand with small Google Ads tests targeting high-intent keywords like “compare pdf online” to get real usage data quickly.

      I’m focused on increasing the % of visitors who actually run a comparison (improving onboarding, adding a sample demo, clearer trust messaging) and measuring whether users feel enough friction to upgrade.

      Still early -> mostly optimizing for learning and real behavior data before thinking about scaling.

      1. 1

        That's a smart approach. Validating with high-intent keywords first provides you with clear signals rather than just vanity traffic.

        One effective strategy I've observed during Phase 1 validation, especially for tools like PDF utilities, is to engage with Reddit threads where people are actively asking questions such as "How do I compare two PDFs?" or expressing frustration with existing tools.

        The benefit of this approach goes beyond just gaining traffic; it offers raw, unfiltered feedback from individuals who are already facing the problem.

        Have you considered exploring this avenue, or are you intentionally limiting your validation to paid search for now?