New Smart compression · Visual quality preserved

Shrink PDFs by up to 80%.
Without losing quality.

Re-encode images, strip metadata, and prune fonts — in your browser. The output is a real PDF, not a blurred JPEG wrapped in a wrapper.

check_circleFiles never leave your browser check_circleLossless text & vector preserved check_circleFour profiles + size-targeted modes
lockpdfpro.tools/app
1.4 MB → 280 KB
picture_as_pdfBrochure.pdf
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Product Brochure · Q4

Six-page marketing PDF · Heavy imagery
High-resolution embedded images and oversized font subsets — the classic recipe for a 14 MB brochure.
imagehero.jpg · 4200×2800 · 2.1 MB
After optimization, images are re-encoded at web-safe DPI without visible quality loss, fonts are subset, and the metadata stream is stripped.
imageproduct-grid.png · 3200×2100 · 1.6 MB
compressCompressing…
Original 1.4 MB
Optimized 280 KB
trending_down−80% saved
Compression profile
descriptionKeep Text−30%
auto_awesomeMixed−65%
imageScanned−80%
boltSmallest−85%
insightsAI Suggestion
✓
This file is image-heavy. "Mixed Documents" will save ~65% without visible quality loss.
!
Fonts are not subset — pruning adds ~140 KB savings.
Workspace

Compress — and see the difference

A real side-by-side view of your file, before and after optimization. No black-box magic.

compress

Compress

Mixed Documents profile · Re-encoded images
Before 1.4 MB
picture_as_pdf
Brochure_Q4.pdf
original
Pages6
Images14
Fonts8 full
Metadataembedded
arrow_forward
After 280 KB
picture_as_pdf
Brochure_Q4-optimized.pdf
optimized
Pages6
Imagesre-encoded
Fontssubset
Metadatastripped
−80%
1.12 MB savedFrom 1.4 MB to 280 KB
Faster to shareEmail-ready attachment size
Profiles

Pick the profile — or target a size

Four quality profiles plus two size-targeted modes. Keep searchable text, or flatten to images — you choose the trade-off.

description

Keep Text & Layoutsearchable

Searchable text stays intact. Best for text-heavy documents.

auto_awesome

Mixed Documentsflattens text

Balanced compression for text and images.

image

Scanned PDFflattens text

Best for scanned pages and image-based PDFs.

bolt

Smallest Fileflattens text

Maximum compression. Visual quality may decrease.

or target a specific size
mail

Under 5 MB auto-tuneauto

Auto-tunes quality to fit under 5 MB. Useful for email attachments.

cloud_upload

Under 10 MB auto-tuneauto

Auto-tunes quality to fit under 10 MB.

How it works

Three steps — no upload, no wait

Everything runs in your browser. Drop a PDF, pick a profile, and download the optimized file.

1

Drop your PDF

Any size, any structure — marketing brochures, scanned reports, image-heavy decks. Files never leave your browser.

2

Pick a profile

Pick a profile (Keep Text, Mixed, Scanned, Smallest) or target a specific size. Searchable text stays intact on the Keep Text profile.

3

Download optimized PDF

A real PDF — fully searchable, still vector, still printable. Ready to email, upload, or archive.

Use cases

When size matters

Real scenarios where shrinking a PDF is the difference between "bounced" and "delivered".

mail

Email attachments

Gmail & Outlook caps attachments at 25 MB. Compress a 30 MB deck to 4 MB and hit send.

−82%
30 MB → 5.4 MBSales deck · Mixed Documents profile
cloud_upload

Portal uploads

HR portals, tax filings, school applications — many cap uploads at 2–5 MB per file.

−73%
8.2 MB → 2.2 MBTax return · Smallest File profile
web

Website hosting

Serve brochures, whitepapers, and manuals without bloating your CDN bill or slowing page loads.

−68%
14 MB → 4.5 MBWhitepaper · Mixed Documents profile
archive

Archival storage

Shrink decades of PDFs in batch. Cut cold-storage bills, speed up backups, stay under disk quotas.

−60%
10 yr → 4 yrStorage cost reduction
phone_iphone

Mobile sharing

WhatsApp caps attachments at 100 MB, but most users stop waiting past 3 MB. Compress first.

−78%
12 MB → 2.6 MBField report · Smallest File profile
print

Print shops

Keep Text & Layout preserves searchable text and high-DPI print quality while removing embedded junk — faster uploads to the printer.

−28%
40 MB → 29 MBMagazine spread · Keep Text profile
Privacy

Your PDF never leaves your browser

Parsing, image re-encoding, font subsetting, and PDF writing all happen locally. We don't receive your file — we literally don't have the ability to.

  • ✓100% client-side processing with pdf.js + pdf-lib
  • ✓Image re-encoding via browser Canvas API
  • ✓Works offline once the page has loaded
  • ✓No account, no upload, no signup required
browser_updatedYour browser
picture_as_pdfPDF parsed locally
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compressImages re-encoded in memory
arrow_downward
downloadOptimized PDF delivered to you
Nothing ever reaches a server.
Start free

Shrink it. Share it. Ship it.

Drop a PDF, pick a profile, and download a file that's up to 85% smaller. No signup. No upload. No wait.

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