Quick start: compress a PDF for Stampli in under a minute

If your real goal is simply make this PDF smaller so it uploads cleanly to Stampli, this is the fastest workflow:

  1. Open Compress PDF.
  2. Upload the invoice packet, PO support PDF, vendor statement, receipt bundle, approval backup, credit memo attachment, or scanned AP record.
  3. Choose Medium compression first.
  4. Download the compressed file and check the new size.
  5. Open it once to confirm invoice numbers, vendor names, dates, totals, PO references, line-item tables, and approver comments still look clean.
  6. If the file came from a scan or the text is not selectable, run OCR PDF before final upload.
Best default for Stampli prep: start with Medium compression. It usually gives the best balance between a smaller file and a document that still feels trustworthy when AP, finance, procurement, or approvers open it later.

Why smaller PDFs help in Stampli workflows

Stampli workflows often involve more than the invoice itself. Teams may be uploading invoice packets, PO support pages, receiving documentation, vendor statements, credit memos, approval backup PDFs, receipts, or scanned AP paperwork. When one file is heavier than it needs to be, uploads take longer and later reviews feel clumsier than they should.

Smaller PDFs are easier to upload, faster to open, and less frustrating to review across accounts-payable work. That matters even more when a file includes old scans, phone-captured receipts, screenshots, stitched backup pages, or exported reports that quietly picked up extra weight after several save cycles. Compression is not about chasing the tiniest possible file. It is about removing avoidable weight while keeping the document clear enough to trust.

Why compression helps

  • Faster uploads: useful when you need to move an invoice or AP-support PDF into Stampli without friction.
  • Smoother reviews: lighter PDFs are easier for AP, finance, controllers, and approvers to open during routine checks.
  • Cleaner storage: smaller files are easier to archive, resend, and retrieve later.
  • Less scan bloat: receipts, signed approval sheets, and paper-origin invoice backups often carry oversized images, borders, or blank pages.
  • Better reuse: a leaner PDF is easier to split, compare, OCR, or extract pages from when the next workflow step appears.

If the PDF is mostly text, tables, signatures, and ordinary supporting pages, it usually should not feel huge. When it does, the file size often comes from scans, duplicate pages, unnecessary appendices, or image-heavy proof documents rather than the actual AP content.

Simple rule: if the file is mainly invoices, statements, receipts, and standard support pages, protect readability first. Remove obvious waste before you reach for aggressive compression.

What file size should you aim for?

There is no single perfect number for every Stampli workflow, so practical ranges are more useful than perfection. You want a file that uploads cleanly, opens quickly, and still looks reliable when someone is checking vendor details, invoice totals, dates, PO references, account notes, or approval comments.

Document type Practical target Why it works
Text-heavy invoice, vendor form, or PO support PDF < 1MB to 2MB Usually enough for files that should stay easy to upload and review
Invoice packet, mixed AP backup, or statement bundle 1MB-3MB Leaves room for tables, cover pages, and standard supporting files without feeling bulky
Scanned receipts, image-heavy credit backups, or paper-origin AP records 2MB-5MB Gives scan-heavy pages breathing room while still keeping the file manageable
Over 5MB Usually needs cleanup At that point, trimming pages or fixing scan waste often works better than compressing harder
Good target: if the document is mostly invoices, forms, tables, signatures, and ordinary AP support pages, try to keep it comfortably under 2MB. If a straightforward Stampli packet is much larger than that, there is usually removable file weight inside it.

Which compression level should you choose?

The best setting depends less on the platform name and more on what is inside the PDF. Start with the lightest setting that gets the file into a practical range.

Low compression

Use this when the file already looks clean and only needs a modest size reduction. It is often enough for digitally generated invoices, statements, or exported PO support files.

Medium compression

This is the best default for most Stampli uploads. It usually cuts enough file weight to make the PDF easier to handle without making vendor names, totals, PO references, or approval notes noticeably worse.

High compression

Use this more carefully. It can help on bulky scans and image-heavy appendices, but it is also the setting most likely to soften tiny field text, faint stamps, low-quality screenshots, or already-weak paper documents. If you need high compression, preview the result carefully before uploading it.

Safe starting point: choose Medium, review the result once, and only push harder if the file is still bigger than it needs to be.

Step-by-step: shrink a PDF with LifetimePDF

Step 1: Start with the cleanest source file you have

If you can export a fresh PDF from the original system, do that first. Re-compressing a file that has already been degraded usually makes readability worse, not better.

Step 2: Open the compressor

Go to Compress PDF and upload the file you plan to use in Stampli. This could be an invoice packet, statement backup, PO support document, approval PDF, vendor correspondence, receipt bundle, or scanned AP attachment.

Step 3: Choose the right compression level

Start with Medium unless the file is already small or obviously scan-heavy. For most invoice and AP PDFs, that is the safest balance between size reduction and readable detail.

Step 4: Review readability before upload

Open the compressed PDF once and check the parts another reviewer will care about most: vendor names, dates, invoice numbers, totals, PO references, line-item tables, currency fields, coding notes, and approval comments. If the file looks soft at normal zoom, stop there and use a lighter setting.

Step 5: Run OCR on scan-based files when needed

If the PDF came from a scanner and the text is not selectable, use OCR PDF so the finished file is easier to search and work with. Compression reduces file weight, but OCR is what helps a scan behave more like a real document.

Step 6: Clean the structure if the file is still bulky

If the PDF remains too large, do not just keep compressing harder. Remove blank pages, split unrelated attachments, crop scan borders, or extract only the pages the workflow actually needs.

Need the shortest version? Compress once, review once, then clean scan waste or extra pages only if the file is still too big.

Compress PDF OCR PDF Extract Needed Pages

Best strategy for invoices, statements, and AP support files

Different Stampli-ready PDFs gain file weight in different ways. A practical prep workflow depends on the kind of document you are dealing with.

Invoices and invoice-support packets

These often include the invoice itself, statement pages, approval notes, screenshots, credit backups, and extra supporting attachments. Medium compression is still the safest first choice, but check invoice numbers, totals, dates, and PO references carefully before upload.

Vendor statements and reconciliation support

These can mix tables, email printouts, remittance notes, and supporting comments. Medium compression usually works well, but account balances, dates, open-item references, and small notes deserve a quick visual check.

Receipts, scanned bills, and paper-origin backups

This is where file size often balloons. Phone-captured receipts, printed bills, and scanned declarations usually carry extra borders, blank backsides, or oversized images. Cleaning those problems first usually works better than attacking the file with strong compression alone.

Approval records and policy support PDFs

These are often text-heavy and compress well. Start with medium compression and aim for a clean file under about 2MB if possible. The main thing to protect is legibility in names, dates, policy references, signatures, and comment history.

Good habit: keep the core invoice or statement lean and move bulky support material into separate PDFs when that makes later review and retrieval clearer.

What if the PDF is still too large?

If compression helped but not enough, the next step is usually cleanup rather than another stronger pass. A few targeted fixes protect quality better than aggressive recompression.

Option 1: Remove unnecessary pages

Blank pages, duplicate scans, outdated drafts, and instruction sheets quietly add file weight. Use Delete Pages to strip them out.

Option 2: Extract only the pages that matter

If the workflow only needs the signed invoice, one statement page, one receipt set, or a small supporting section, separate those pages with Extract Pages instead of keeping one oversized bundle.

Option 3: Split one bulky packet into smaller files

For very large packets, Split PDF can make review cleaner and the upload less awkward.

Option 4: Clean the scan before compressing again

Oversized borders, sideways pages, and image-heavy scans are common reasons a file stays large. Crop PDF, Rotate PDF, and OCR PDF can improve the file before a second compression pass.

How to keep invoice and approval details readable

A smaller file is only helpful if people can still review it confidently. For scan-based invoices and statement backups, it also helps when the text is actually searchable instead of trapped inside an image.

Usually safe to compress

  • Standard invoice text from a clean export
  • Simple approval pages and signatures
  • Ordinary tables and headings
  • Short vendor forms with clear typography

Be more careful with

  • Tiny totals fields or dense line-item tables
  • Faint approval stamps, initials, or signatures
  • Low-quality receipt scans or screenshots
  • Long reference strings and coding notes
  • Image-only scans that need OCR for practical reuse

Simple checklist before upload

  • Open the compressed file at normal zoom first
  • Check vendor names, dates, totals, PO numbers, statement references, and the smallest paragraph text
  • Make sure tables, receipts, and approval notes still look clean
  • If the file is scan-based, confirm the text can be searched or selected after OCR
  • Keep the original file in case you need to redo the export more cleanly
Useful rule of thumb: if a reviewer would need to zoom immediately just to read normal text, the PDF was compressed too hard or started from a poor scan.

Stampli prep habits that keep uploads cleaner

Many oversized PDFs are not really compression problems. They are document-prep problems. A few habits make future uploads much easier.

Smart habits before you upload

  • Export from the source again when possible: a fresh PDF is usually cleaner than a file that has already been edited and re-saved many times.
  • Run OCR on paper-origin files: use OCR PDF when a scan is not searchable.
  • Trim support material early: keep only the pages the workflow actually needs.
  • Compare revisions separately when needed: use Compare PDF instead of packing multiple invoice or statement versions into one bloated file.
  • Merge intentionally: use Merge PDF when pages belong together, not just because they can.
  • Clean hidden file properties if needed: use PDF Metadata Editor before sharing or archiving sensitive AP packets.

A practical workflow is usually: Export clean PDF → Compress → Review → OCR if needed → Upload to Stampli. Add page trimming or packet splitting only when the file actually needs it.

Compressing a PDF for Stampli is usually one step inside a broader AP or invoice-approval workflow. These tools pair well with it:

  • Compress PDF - shrink invoices, statements, receipts, and support files before upload
  • OCR PDF - turn scanned invoices and AP documents into more searchable, easier-to-review files
  • Merge PDF - combine related pages into one clean packet when needed
  • Compare PDF - review revision differences without juggling bulky exports
  • Extract Pages - isolate only the sections the workflow actually needs
  • Delete Pages - remove blanks, duplicates, or outdated attachments
  • Split PDF - break one oversized packet into smaller files
  • Crop PDF - trim scan borders and wasted space
  • PDF Metadata Editor - clean hidden title, author, and keyword fields
  • PDF to Excel - useful when invoice tables need to be extracted after review

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FAQ (People Also Ask)

1) How do I compress a PDF for Stampli?

Upload the file to a PDF compressor, start with medium compression, download the smaller result, and preview it before using it in Stampli. For most invoice packets, PO support files, vendor statements, and approval backups, Medium compression is the best starting point because it reduces size while keeping important details readable.

2) What PDF size should I aim for before uploading to Stampli?

A practical target is under 2MB for text-heavy invoices, vendor forms, and standard AP support documents. For scan-heavy receipt bundles, statements, or image-based backup files, staying under about 5MB is often a comfortable goal.

3) Should I run OCR on scanned invoice or receipt PDFs before uploading to Stampli?

If the file came from a scan and the text is not selectable, OCR is usually worth doing before the final upload. A searchable, readable PDF is more useful than a smaller image-only file that nobody can search properly later.

4) Will compression hurt totals, PO references, or approval notes?

Usually not if you start with moderate compression and preview the result afterward. The main risks are poor scans, tiny field text, faint approval stamps, low-quality screenshots, or source files that were already difficult to read before compression.

5) What if my Stampli packet is still too large after compression?

Remove blank pages, crop borders, extract only the required sections, or split one oversized bundle into smaller parts. Cleaning the document structure usually protects readability better than forcing much stronger compression.

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Best workflow: Export clean PDF → Compress → Review → OCR if needed → Upload to Stampli.

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