Compress PDF for Accountant
Quick answer: drop the PDF into the compressor below, choose a target (5MB is safe for most email), check the figures are readable and send it. Scanned receipts, invoices and statements are what usually make files too big. It all runs in your browser, so the documents are not uploaded.
At a glance
- Use this page to compress files quickly with a guided workflow.
- Accepted input: .pdf.
- Output: downloadable files generated in-browser for supported workflows.
- Upload Choose your file
- Process Runs locally
- Download Save result
Drop your files here
or tap to browse · accepts .pdf
Runs in your browser. No file uploads for supported tools.
Best on desktop for 100MB+ files · mobile recommended under ~100MB.
How local processing works
- Your PDF is processed in your browser using local JavaScript libraries.
- PDFWhisk does not upload your file to a processing server for supported tools.
- Only normal page assets load from the site (HTML/CSS/JS), not your document contents.
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Security & privacy detailsHow this tool helps
Reduce the file size of your PDF documents instantly, right in your browser. Our PDF compressor uses smart optimization to shrink files by up to 90% while preserving text clarity, image quality, and formatting. Perfect for email attachments, uploading to portals, or saving storage space. Unlike other tools, your PDF never leaves your device - all compression happens locally using your browser's processing power. Choose from three quality levels: high compression for maximum size reduction, balanced for the best mix of quality and size, or low compression to keep near-original quality. Works with scanned documents, reports, presentations, and any PDF file. Use it when you need to split large PDFs for portal limits, compress PDFs on iPhone, reduce email attachment size.
Best for
How it works
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1
Open PDFWhisk
Go to PDFWhisk in your browser — no account or app needed.
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2
Upload your PDF
Click the upload area to select your PDF or drag and drop it onto the page.
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3
Compress the file
PDFWhisk reduces the file size entirely in your browser. No data is sent to a server.
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4
Download the compressed PDF
Click Download once compression is complete. The file is ready to attach or upload straight away.
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5
Check the file size
Confirm the output file meets the size requirement for your platform before uploading.
More files today? Free covers 3 tasks a day and files up to 50MB. For unlimited tasks and bigger files, Pro passes start at £1 for 24 hours. One-off payment, no subscription, and your files still stay on your device.
Intent guide
What you send an accountant is usually a year's worth of paper: receipts, invoices, bank and credit card statements, P60s and pension or rental statements.
Bundle by type, not one giant file
Accountants work through records by category. One PDF per type (sales invoices, expense receipts, bank statements, P60 and P11D) is easier to review than one 80-page file, and each part stays under email limits without heavy compression.
Turn receipt photos into one PDF first
If your receipts are phone photos, use JPG to PDF to make one PDF per month or quarter, in date order, then compress it. Photograph receipts flat on a dark surface so the total, date and supplier are clear; faded thermal receipts need more light, not more compression.
Check the numbers survive
After compressing, zoom in on totals, VAT amounts and dates. Blurred figures cost your accountant time, which can cost you fees. If they are hard to read, use a larger target or split the file instead.
Keep the originals
HMRC expects you to keep records for at least 5 years after the 31 January submission deadline of the relevant tax year (sole traders and landlords). Keep the full-quality files and send the compressed copies.
Before you upload/share
- Open the PDF and check every page before you send or upload it.
- Keep the original files until the recipient or portal has accepted the document.
Frequently asked questions
How much can I compress a PDF?
Typical compression reduces file size by 40-90%, depending on the content. PDFs with large images see the biggest reductions. Text-only PDFs are already quite small and may only shrink by 10-20%.
Does compression reduce quality?
You control the quality level. 'Balanced' mode provides excellent quality at significantly reduced size. 'Maximum' compression will noticeably reduce image quality but produces the smallest files. Text remains sharp at all levels.
Is there a file size limit?
Since processing happens in your browser, the limit depends on your device's memory. Most devices handle PDFs up to 100MB comfortably. For very large files, try splitting them first.
Are my files uploaded to a server?
No. Your PDF is processed entirely in your browser. The file never leaves your device. We cannot see, access, or store your documents.
Can I compress multiple PDFs at once?
The free version processes one file at a time. Pro users can batch-compress multiple PDFs simultaneously.
What to do next
Chain tools together for a complete workflow.
Popular searches for this tool
Intent-specific pages for common real-world tasks (upload limits, email attachments, iPhone workflows, and privacy-first processing).