How HashmiTools PDF Tools Work — Private, Fast, Browser-Based
HashmiTools provides six PDF utilities that run in your browser using PDF.js, PDF-lib, and jsPDF — all open-source libraries that process PDF files entirely on your device. Unlike web services that upload your files to remote servers, HashmiTools PDF tools never send your documents anywhere. This is critical for the types of documents people typically process as PDFs: contracts, bank statements, ID documents, medical records, and confidential business files.
The suite includes: PDF Editor — open a PDF, add text annotations, signatures, shapes, and images using the Fabric.js canvas overlay; extract text content from PDFs; PDF Merge — combine multiple PDFs into one ordered document; PDF Split — extract specific pages from a PDF into a new file; PDF Compress — reduce PDF file size for email attachment limits; and JPG to PDF — convert multiple images into a single PDF with custom page sizing.
Ideal users: professionals who need to annotate contracts or reports without Acrobat; students combining multiple assignment documents into one submission; HR and legal teams splitting large documents into individual sections; anyone who needs to reduce a PDF below an email attachment limit (typically 10–25MB); and individuals adding digital signatures to forms.
Frequently Asked Questions
Are password-protected PDFs supported?
PDFs with owner-level protection (restrictions on printing, copying, editing) can be opened by the editor but the restrictions are typically respected by PDF-lib's implementation. PDFs with user-level password protection (requiring a password to open) need to be unlocked by entering the correct password — the tools do not break or bypass encryption. If you have legitimate access to a password-protected PDF (i.e., you own it or have been given the password by the document owner), the editor will accept the password and allow editing. Always ensure you have legal rights to edit or modify any PDF before using these tools.
How much can PDF Compress reduce file size?
Compression results depend heavily on what's in the PDF. Text-heavy PDFs (legal documents, reports) typically compress 10–30% because text is already efficiently encoded. Image-heavy PDFs (scanned documents, photo collages) can compress 40–80% by recompressing the embedded images at lower quality. PDFs that are already maximally compressed (some generated by design software) may see minimal size reduction. For the best results on scanned documents, use the PDF Compress tool with the "Aggressive" quality setting, which resamples embedded images to screen resolution (72–96 DPI) — sufficient for digital sharing but not for high-quality printing.
Does the PDF Editor support digital signatures?
The PDF Editor supports adding signature images — you can draw your signature in the editor's signature panel, save it as a PNG, and place it on any page of the PDF. This creates a visual signature that is legally sufficient for most informal document signing in Pakistan (scanned ink signatures have been broadly accepted in commercial contexts). It does not create a cryptographically verified digital signature (the kind that creates a tamper-evident record verifiable by a certificate authority) — for those, you need a dedicated digital signature service with PKI infrastructure. For most business, academic, and personal document signing needs, the visual signature approach is adequate and widely accepted.