Compress invoices, statements, and reports to email-friendly sizes. Four quality presets, optional grayscale, normalise to A4 or US Letter. Typical 60–80% file-size reduction with no loss of readability for financial documents.
01 — What you create
Drop a PDF, pick a preset, see a live size estimate. The High preset is the right default for most invoices and statements — readable on screen, ~60–80% smaller than the source.
HDFC monthly statement
May 2026 · 14 pages
Preset: High
Colour · auto size
ORIGINAL
4.8 MB
COMPRESSED
980 KB
SAVED
▼ 80%
SAMPLE OUTPUT FILES
Result is image-rasterised but identical-looking. Perfect for email attachments and archive storage.
Scanned invoices, multi-page batches, multi-currency stacks, and direct push into your accounting system. Free for 30 days, no card required.
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02 — How it works
Most "10 MB invoice attachment" emails fail because the underlying PDF was scanned at print DPI for screen viewing — wasting 80% of the bytes. This tool re-renders the pages at the right DPI for the use case, keeping the document readable while making the file dramatically smaller.
Drag an invoice, statement, or report into the picker. The tool reads its page count and dimensions in the browser — nothing uploads.
High is the right default for most financial PDFs. Drop to Extreme for email-size emergencies; bump to Medium / Low when print fidelity matters.
One click rasterises each page at the chosen DPI + JPEG quality and re-emits a single compressed PDF. Real before/after size shown after save.
03 — Built for attachments
Extreme (smallest), High (recommended default), Medium (balanced), Low (near-source). Each preset sets a scale and JPEG quality calibrated for financial documents.
Convert to grayscale before re-encoding for roughly an additional 30–45% file-size reduction. Invoices and statements rarely need colour — bank logos still read fine.
Keep each page at its source size, or normalise everything to A4 or US Letter for consistent print-ready output. Useful when scanned pages came in at odd sizes.
See the estimated output size + savings % as you change presets. Estimate updates instantly — no need to compress to find out it's too big.
After compression, the tool reports the actual output size and real savings %, calculated from the rendered PDF blob — not just the estimate.
Files never upload. Compression runs entirely on your machine via the same PDF stack used by Merge / Split. Nothing hits a server, ever.
Bulk OCR, batch invoicing, multi-party e-signing, redaction, audit logs — pdfFiller picks up where Sonchoy ends. Free for 30 days, no credit card.
Run 100+ invoices, statements, or conversions in one go.
Turn paper invoices into searchable, exportable data.
Multi-party signatures with full audit trails.
Mask sensitive ledger lines before sending to auditors.
04 — Common questions
Most invoice and statement PDFs are produced by scanning at 300 DPI (print resolution) or by enterprise accounting tools that embed full-colour PNGs of each page. That's overkill for on-screen reading and email — 100–150 DPI is plenty. This tool re-renders at the right DPI for the use case, which is where the 60–80% file-size savings come from.
No — same trade-off as the Merge and Split tools. The compressed PDF is a series of JPEG-encoded page images, so any text becomes part of the image. The visible content is identical, but Ctrl-F won't find words. For searchable compressed output, run OCR on the result, or use a desktop PDF tool that supports lossless compression of text-and-image PDFs.
High is the recommended default — about 60–80% smaller than the source with no perceptible quality loss for invoices, statements, or text-heavy reports. Drop to Extreme for "must email this 12 MB file right now" emergencies. Bump to Medium or Low when print fidelity matters (e.g., the recipient is going to print and archive in physical files).
It does remove colour, obviously, but for the vast majority of financial documents grayscale is fine: text reads identically, tables remain legible, and most logos still scan as monochrome marks. If colour is critical (e.g. a marketing PDF with brand identity), leave it on Full colour. If you're just archiving statements, grayscale typically buys an extra 30–45% shrink on top of the preset.
Within ~20% for most invoices and statements. Documents with heavy graphics, embedded logos, or unusual page sizes can deviate further. The "actual size" panel that appears after compression shows the exact figure — refer to that for the real number, not the estimate.
Never. The source file is read into memory, page-rasterised in a canvas element, re-encoded as JPEG, and assembled into a new PDF blob — all in your browser. The download is triggered locally via the browser's standard file-save mechanism. Nothing is uploaded to Sonchoy or any third party.
05 — Related tools