No server upload round-trip
Your selected PDF content is not sent to BytesPDF servers for processing.
Core tools free todayNo account to processYour PDF stays on your device.
Your PDF stays on your device.
Merge, compress and edit it right here.
Unlike other tools, we never receive your files. Everything happens inside this browser tab — no upload, no account, no signup, no watermark, no waiting. Drop a file, process it, download it.
Drop your PDF here, or browse from computer
Or choose files from your device. They stay in this tab and are processed in your browser—not uploaded to BytesPDF servers.
PDFs only · up to 10 PDFs / 150 MB per session · No account · No signup · No watermark
Quick actions
Processed in your browserCore compression and merge do not upload PDF content to BytesPDF servers.
No account, no signup, no watermarkFree to use end to end. Nothing is gated, capped or stamped.
Clear file limits150 MB desktop · 50 MB mobile/session. Device memory may lower practical limits.
Zero friction, stated plainly
- No signupDrop a file, process it, download it. We never ask you to create an account.
- No emailNo address, no verification link, no newsletter gate standing in front of your file.
- No watermarkThe output is clean. Nothing is stamped on your document, ever.
- No daily limitNo task quota, no queue, no "come back tomorrow". Run a tool as often as you need.
- No uploadProcessing happens in this browser tab. Your file never reaches a server.
The only limits are the ones a browser sets: 150 MB per session on desktop, 50 MB on mobile, and the file count shown on each tool. No account changes them.
18 tools
Find the right PDF tool
Compress, organize, convert, secure, or check a PDF. Search by name or filter by category.
18 tools, one click from the navbar
Core
Compress PDF
Shrink image-heavy PDFs locally.
Shrink filesMerge PDF
Combine files into one, in your order.
Combine filesEdit PDF
Add text and marks; organize pages.
Edit pagesCompress to a Target Size
BytesPDF Pro target-size compression; check results.
Hit a sizePDF to Word
Visual page copy or editable Word text · experimental beta.
Convert to WordWord to PDF
Turn .docx into a clean, searchable PDF.
Create PDFExcel to PDF
Print every sheet as a tidy grid.
Create PDFSign a PDF
BytesPDF Pro · real PKCS#7 signatures on-device.
Sign nowPassword Protect
AES-256 encryption with reader permissions.
Add passwordRotate PDF
Rotate one PDF free; Pro handles batches.
Rotate pagesRedact Text
Find text or draw boxes on scans. Review the output.
Redact textOCR a Scan
BytesPDF Pro OCR makes scans searchable locally.
Make searchableRename PDFs in Bulk
BytesPDF Pro batch rename with live preview.
Rename filesRemove Metadata
See and scrub hidden author data.
Scrub metadataCheck Before Sending
Portal limits, metadata and redaction checks.
Run checksNewCompare Versions
Line-level diff between two drafts.
Compare filesSecure Cleanup
Rebuild pages-only: scripts and history gone.
Clean fileTeam Workspace
Share activity, not documents.
Open workspaceSimple & direct
3 steps to compress or merge a PDF
Choose a core tool, adjust its options, and save the result in your browser.
1
Choose compress or merge
Select a PDF task in the drop area, then add files from your device.
2
Set up your file
Choose a compression preset or arrange the merge order, then review the available options.
3
Download your PDF
Download it the moment it's ready. No account, no email, no watermark — the PDF never left your browser.
- No PDF upload step
- No watermark
- Free core tools
- No account or signup, ever
$0
Current core-tool price
150 MB
Desktop input limit
50 MB
Mobile/session limit
0
Signups before your first download
Trustpilot
Read and write Trustpilot reviews
The current number of reviews comes directly from Trustpilot. Visit our profile to read the reviews or write one; BytesPDF does not reproduce or edit review content here.
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Limit-first
Any other target sizeStart from the limit you're actually up against
Portals publish a hard ceiling and reject anything above it. Pick the one blocking you and the compressor opens already pointed at that target — no guessing at quality settings.
2 MBVisa applicationCEAC portal2 MBResumejob portals25 MBEmail attachmentGmail · OutlookCourt filingvaries by portalSchool submissionvaries by portalSomething else500 KB · 2 MB · 5 MB…
12 use-case pages in total — or start with the plain compressor.
Real workflows, less friction
See the tools before you open them
Preview how compression, merging, signing, and conversion work. These are illustrative interface examples; actual processing results depend on your file.
bytespdf.com/compress-pdfUI preview
PDFsample-report.pdfSample PDF · 12.4 MB · 48 pages
Image qualityBalanced
Example output · 1.9 MBIllustrative only · results varyEXAMPLE
Illustrative interface only—no file was processed. Compression results vary by PDF.
Open the compressorNo file selectedPreview only · no processing shown
Built for everyday PDF work
Useful wherever documents are part of the day
Start with a focused tool, keep the original, and check the result against the destination’s requirements.
Students
Prepare assignment and application PDFs, then check the destination’s file rules before submitting.
School submission tipsFreelancers
Organize resumes, proposals, and client paperwork with focused browser-based PDF tools.
Resume file guidanceSmall businesses
Prepare invoices, catalogs, and records while keeping selected PDF content out of BytesPDF servers.
Business document tipsLegal and finance teams
Work with filing packets and statements locally; always verify portal rules and inspect the final copy.
PDF tools for law firmsAccountants and bookkeepers
Assemble client statements and schedules into one pack on your own device, then check it before sending.
Client pack workflowDevelopers
Use a small utility to decode PDF bytes that already form a complete document.
Open the byte utilityArchitecture, not a promise
Read the security model Your PDF content stays in your browser
Selected PDF content is processed locally and is not uploaded to BytesPDF servers. Your device, browser, extensions, downloaded output, and the destination where you send a file remain part of the security boundary.
A shorter data path
For the core PDF workflows, the selected document is read in this tab, processed locally, and returned as a separate download. Working data is kept in tab memory rather than a BytesPDF document queue or persistent browser storage.
Your PDF
selected locally
This browser tab
processes the file
Download
you keep the copy
Clear device limits
Desktop and mobile limits are published up front; actual capacity also depends on browser memory and file complexity.
Free core tools, with clear limits
No BytesPDF watermark; current file and device limits apply. BytesPDF Pro is $9.99/month for specialist workflows. Check pricing for current checkout status.
Side by side
Read the sourced comparisonsThe one row the other homepages can't fill
iLovePDF, Smallpdf and PDF24 all process your document on their servers — that is the deal, and their security pages say so. Here is the same deal set out as rows, so you can check it instead of taking a badge for it.
The questionUpload-based toolsBytesPDF
Where your file goes
Others:Uploaded to the provider's servers, processed there, then deleted on their schedule.
BytesPDF:Read and rewritten inside your browser tab. Never uploaded to BytesPDF servers.
Account needed
Others:Usually required for repeat or larger jobs, with free-tier usage quotas.
BytesPDF:None. No account, no signup, no email — not even to download.
What limits you
Others:The provider's quota: tasks per hour, pages per document, or a paywall.
BytesPDF:Your own device memory, published up front: 150MB desktop, 50MB mobile.
After the page loads
Others:Still needs the round trip: your file up, their output back down.
BytesPDF:Processing stays local, so the file itself never needs the connection.
What it costs
Others:Free tier plus a subscription prompt for the tools people actually need.
BytesPDF:Free, full stop. No account, no signup, no watermark, no daily task cap.
Our limits are published, not discovered at the paywall.
Start free. Add Pro for specialist workflows.
Free processing and downloads stay available within published limits, with no account, signup or email. Pro checkout and access are subject to verified subscription status.
Free core
$0
Current core tools
- Single-file PDF compression with three presets
- Merge up to 20 files on desktop or 10 on mobile
- No BytesPDF watermark
- No account, signup or email — even for the download
Specialist workflows
$9.99/ month
Individual plan
- Target-size compression (best-effort)
- Batch rename and rotate workflows
- Folder import, local OCR, and digital signatures
- Same browser-local processing model
Checkout is not offered when subscription eligibility cannot be verified.
Pro does not promise higher file or page limits. OCR has a 25 MB / 20-page run limit; actual capacity depends on your browser and device.
Answers & comparisons
Answers & Tool Comparisons
29 direct answers about compression, quality and privacy, plus honest comparisons with the tools you are probably weighing up.
Most-asked PDF questions
- Why Is My PDF File So Big? A 30-Second Diagnosis
- Why Is PDF Compression Not Making My File Smaller?
- Does Compressing a PDF Reduce Quality?
- Why Won't My PDF Upload Even Though It Is Under the Size Limit?
- Is Browser-Based PDF Compression Safe?
- Can You Compress a Digitally Signed PDF?
- Why Is a Scanned PDF So Large?
- Does PDF Compression Affect OCR Accuracy?
FAQ
Frequently Asked Questions
Understand the processing model, practical limits, and the checks that still matter.
Still unsure about something?
For questions about a specific tool, check its details or ask us directly.
Is it free, and what file limits apply?
The core tools are free. Desktop PDF inputs are limited to 150MB; mobile compression and merge sessions use a 50MB limit. Desktop merge supports up to 20 files and mobile merge up to 10, subject to available browser memory.
How does BytesPDF process files privately?
Selected PDF content is read and rewritten inside this browser tab and is not uploaded to BytesPDF servers. Your device and browser remain part of the security boundary.
Is BytesPDF safe for sensitive documents?
PDF content is processed locally and is not uploaded to BytesPDF servers. Security still depends on your device, browser, extensions, downloaded-file handling, and the portal where you later submit the result.
Does BytesPDF work offline?
BytesPDF requires a connection to load the site and its assets. Once the required code is available in the current session, the selected PDF is processed locally and is not uploaded to BytesPDF servers.
What happens to my files after processing?
Working PDF data remains in this tab's memory and is not stored on BytesPDF servers or in persistent browser storage. Closing the tab releases it; any file you download remains where you saved it.
From the blog
Latest PDF Guides & Insights
Learn best practices for PDF compression, security, and document optimization.
Visa & immigration documents7 min read
New Zealand Visa Uploads: PDF Rules, One File and Photo Specs
Immigration New Zealand's published guidance describes PDF and one-file rules plus separate photo requirements. The under-10 MB figure comes from one form, not a universal portal cap.
Visa & immigration documents7 min read
Thailand e-Visa Uploads: Check the Format and Size for Your Mission
A 3 MB cap and JPG/JPEG passport-page instructions appear in specific Thai e-Visa guidance—not a guarantee for every application. Check your mission's upload slots first.
Developer workflows9 min read
Download a PDF from Base64 or Uint8Array in JavaScript
An API hands you a long string that starts with JVBERi0. You do not need to generate a PDF — you need to restore the bytes, name the file, and prove you received a document.
Document workflows6 min read
How to Combine PDF Files on Mac: Preview and Browser Workflows
Use Preview for individual-page assembly or a browser-local merger for whole files. Preserve originals and verify the combined document, not just its thumbnails.
Privacy and security6 min read
How to Password Protect a PDF on Mac Without Acrobat
Follow Apple's Preview password workflow or use browser-local encryption. An open password protects access; permission flags and a locked-file icon mean different things.
Compression guide8 min read
How to Reduce PDF Size on Mac: Preview and Browser Options
Two local workflows for a smaller PDF on Mac: Preview's export filter or browser-based quality controls. Keep the original, check the bytes and inspect the copy.
Compress or merge PDFs for $0 today.
Every core tool runs in your browser: no account, no signup, no watermark, no upload. Drop a file and download the result in one go. File and device limits apply.
No account · No signup · No watermark · No PDF upload