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Tools / Edit and sign PDFs / StackTools

StackTools

Free PDF and photo tools that keep files on your device.

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What it does

StackTools has two free browser apps: StackPDF for merging, splitting, compressing, converting, OCR and redacting PDFs, and StackImage for compressing, converting and cleaning up photos. Files are processed in the browser and many tools work offline after the first visit.

Best for

Handling contracts or ID copies without sending them to a server.

Alternatives to StackTools

  1. Documenso

    Open-source e-signatures

    Best for: Sending contracts for signature

    Free plan

  2. iLovePDF

    PDF tools in the browser and on desktop

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  3. Kopitiam

    Free PDF tools that run in your browser

    Best for: Quick PDF jobs without a subscription · Made by the team behind Cratepick

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  4. Smallpdf

    Online PDF tools

    Best for: Occasional conversions

    Free plan

Answers by Sampan