What is OmniConverter?

OmniConverter is a free online converter suite with professional-grade tools for unit conversion across 20+ categories, color design tools (palette generator, gradient maker, color picker), 200+ Google Fonts browser, image compression and conversion (17 tools), PDF tools, text utilities (case converter, word counter, diff checker), technology history timelines, and news coverage across 7 sections.

Is OmniConverter free to use?

Yes, all OmniConverter tools are completely free. No sign-up, no account, no subscription required. Just open and convert.

Does OmniConverter support multiple languages?

Yes, OmniConverter is available in 8 languages: English, Spanish, French, German, Chinese, Japanese, Hindi, and Arabic. Blog posts are in English only.

What unit conversions does OmniConverter support?

OmniConverter supports 20+ unit categories including length, weight, temperature, area, volume, speed, time, currency, digital storage, pressure, energy, power, force, frequency, angle, fuel consumption, shoe size, clothing size, ring size, and more. All conversions use exact factors with live currency rates.

Is OmniDocuments free to use?

Yes, all OmniDocuments tools are completely free with no usage limits. No sign-up or account is required. Everything runs client-side in your browser.

Are my PDF files uploaded to a server?

No. All PDF processing happens locally in your browser using JavaScript PDF libraries. No files are ever uploaded to any server. Your documents stay completely private.

Can I merge multiple PDF files into one?

Yes. The Merge PDF tool lets you drop multiple PDF files, reorder them as needed, and download a single combined PDF. Everything happens instantly in your browser.

Does compress PDF reduce file size significantly?

Yes. The Compress PDF tool reduces file size by optimizing images and removing unnecessary metadata while maintaining readable quality. Results vary depending on the original PDF content.

Back to Converter

OmniDocuments

11 free PDF and Office tools, merge, split, reorder, delete, rotate, compress, convert, plus an Excel formula generator. All processing happens in your browser.

Select a tool below to get started

Add Page Numbers to PDF

Excel Formula Generator

Document workflows fast, private, no uploads

All 11 tools run in your browser with pdf-lib / local parsing. No file leaves your device ideal for contracts, invoices, or research drafts. Pick by task:

PDF page surgery

Merge PDF combine multiple PDFs in the order you choose.
Split PDF extract pages or ranges into new files.
Reorder / Delete / Add Pages drag to reorder, drop pages, insert blanks.
Rotate PDF fix a sideways scan without re-exporting.

Size, format & formulas

Compress PDF reduce size locally; text PDFs shrink more than scanned images.
PDF ↔ Word / Excel → PDF keep layout best-effort; complex tables or fonts may need a quick check.
Excel Formula Generator describe a calculation in words, get a paste-ready formula.

Quality note: Scanned PDFs are images inside compression trades resolution vs bytes. For text PDFs, we recompress streams without rasterizing.

Privacy & limits

Files stay local. Very large PDFs (> 100 MB) or 200+ pages may hit browser memory on phones split first, then merge. For signatures or legal archiving, keep a copy of the original and verify the exported PDF opens in Acrobat/Preview.

How PDFs stay sharp and private

Think of a PDF as a box of pages. Our tools open the box in your browser, show you thumbnails, and let you reorder, delete, or add pages before sealing a new box. For PDFs that are scans, the pages are photos shrinking them from 300 DPI to 150 DPI halves bytes but softens text. For PDFs that are text, we recompress the streams without turning them into photos, so they stay crisp and small. All boxes are sealed locally with pdf-lib, so the papers never leave your desk.

When to use each tool

Merge for onboarding packets many PDFs → one.
Split for sharing only pages 5-10 of a 50-page scan.
Reorder/Delete to fix a scan where pages 3 and 4 were swapped.
Compress for email text PDFs often drop 20-60%, scans depend on DPI.

Word & Excel → PDF tips

We read .docx with mammoth and .xlsx with SheetJS, then write PDF with pdfmake. Headings, lists, and tables usually survive, but complex fonts or scanned pages may need a quick check in Preview. Always keep the original and verify the PDF opens before sending.

Goal	Tool	Save
Combine reports	Merge	One file, order by drag
Fix sideways scan	Rotate 90°	Readable without re-scan
Email limit	Compress	20-60% for text PDFs
Formula help	Excel Generator	Paste-ready =SUMIF

Frequently Asked Questions OmniDocuments

Are my PDFs uploaded?

No processed with pdf-lib in your browser. Closing the tab removes the data.

Will formatting survive PDF → Word?

Mostly. Headings, lists, and tables convert well; scanned pages become images and need OCR (not included). Check the Word file before sending.

How much can compression save?

Text-heavy PDFs often drop 20–60%. Scanned pages depend on DPI compressing a 300 DPI scan to 150 DPI halves bytes but softens text.

What Are Online PDF and Document Tools?

Online PDF and document tools let you edit PDFs and convert Office files without installing software. OmniDocuments brings 13 free tools together, Merge PDF, Split PDF, Reorder PDF Pages and Delete PDF Pages, Add PDF Pages and Rotate PDF, Add Page Numbers to PDF, PDF Metadata Editor, Compress PDF, plus PDF to Word, Word to PDF, and Excel to PDF converters, along with an Excel Formula Generator.

Every tool runs with browser JavaScript libraries like pdf-lib, pdfjs-dist, mammoth and SheetJS, your files never leave your device. That means instant previews with thumbnail rendering, precise page ranges, drag-and-drop reordering, and quality-controlled compression. No accounts, no queues, and no watermarks, just upload, edit, and download.

When Should You Use OmniDocuments?

For PDF organization: Merge multiple reports into one file, split a large PDF by page ranges, delete confidential pages, reorder pages by dragging thumbnails, insert pages from another PDF at any position, or rotate sideways scans to portrait before sharing.

For file size and compatibility: Compress PDFs to hit email or upload limits while keeping text readable, or convert PDFs for editing. Extract text into an editable Word document, turn a DOCX back into a print-ready PDF, or render Excel workbooks as paginated PDFs for distribution.

For privacy-sensitive work: Process contracts, invoices, medical forms, and student assignments locally. Since nothing is uploaded to a server, sensitive documents stay private and you get results even on slow connections.

Why Use OmniDocuments Over Other PDF Editors?

100% private, browser-only: Files are processed via Canvas and in-memory PDF manipulation in your browser, nothing is uploaded. That protects privacy and is faster than cloud tools for typical documents.

Precise control: Split by exact page ranges, select pages by clicking thumbnails, drag to reorder with live previews, choose rotation 90° / 180° / 270°, and pick compression levels with real-time size savings shown.

Complete Office workflow: Handle PDFs and Office files in one suite, no need to jump between sites for Word ↔ PDF or Excel → PDF. Mammoth preserves headings and lists, SheetJS renders tables with formatting for clean exports.

Free and instant: No sign-up, no limits, no watermarks. Generate print-ready PDFs at any size, editable Word docs, and spreadsheet PDFs, ready for email, printing, archiving, and collaboration.