Upload a file. We'll show what
you can do.
Drop any document, image, spreadsheet, or archive. FormatOS detects the format and shows only the actions that actually work.
Workspace
Drop any file here
Format auto-detected. Browser-first. No account needed.
Browser-first · No file storage · Privacy respected
Only upload files you own or have permission to process. Keep backups of important originals. Your files are processed in-browser whenever possible — never stored.
Or jump to a specific tool below ↓
137
Active tools
7
Tool categories
28
File formats
$0
Always free
Know what you need?
Go direct.
One click — no upload needed here, just open the tool and start.
Jump straight in.
Every tool below runs entirely in your browser. Click to open — no upload required on this page.
Merge PDF
Combine multiple PDFs into one
Split PDF
Break a PDF into separate pages
Rotate Pages
Fix page orientation in a PDF
Add Page Numbers
Stamp numbered footers on pages
Remove PDF Metadata
Strip author, title, date fields
Compress Image
Reduce image size by quality
Resize Image
Scale to exact pixel dimensions
PNG → JPG
Convert PNG to JPEG format
JPG → WebP
Convert JPEG to modern WebP
Favicon Generator
Generate .ico from any image
Extract ZIP
Unpack a ZIP archive in-browser
Files to ZIP
Package files into a new archive
CSV to JSON
Convert spreadsheet rows to JSON
JSON Formatter
Beautify and validate JSON
Word Counter
Count words, chars & reading time
Markdown → HTML
Render Markdown as clean HTML
Every tool you
actually need.
Browse by category, or drop a file on the homepage and let FormatOS decide.
PDF Tools
9Edit, split, merge & clean PDFs
- Merge PDF
- Split PDF
- Rotate Pages
- Add Watermark
- Remove Metadata
Image Tools
22Convert, compress, resize & edit images
- Compress Image
- Resize Image
- PNG → JPG
- SVG → PNG
- Favicon Generator
Archive Tools
21Create, extract & inspect ZIP files
- Extract ZIP
- Files to ZIP
- Password-protect
- Inspect Archive
- Reduce ZIP
E-book Tools
22Inspect, convert & compress EPUBs
- EPUB Inspector
- EPUB Validator
- EPUB to PDF
- Compress EPUB
- Word Count
Data Tools
33Convert CSV, JSON, XML, YAML & XLSX
- CSV to JSON
- JSON to CSV
- JSON Formatter
- XML to JSON
- Table to Markdown
Text Tools
26Case, encode, clean & transform text
- UPPERCASE / lowercase
- Word Counter
- Markdown → HTML
- Base64 Encode
- URL Encode
Scan Tools
4Clean & enhance scanned documents
- Clean Document
- Enhance Contrast
- B&W Scan
- Scan to PDF
All Tools
Full directory with every active tool
Sound familiar?
FormatOS exists for the file frustrations everyone runs into.
The form only accepts PDF
Drop your DOCX — FormatOS detects it and shows document conversion instantly.
Attachment is too large to email
Upload the image or PDF, choose compress, and download a smaller version.
PNG looks broken on another device
Convert to JPG or WebP in seconds — transparency handled correctly.
Video needs to be a smaller file
Upload your own MP4. If the media engine is active, FormatOS shows compression and trimming.
How it works
From upload to download, every step stays clear.
Upload
Drop a file or choose one from your device.
Detect
The tool reads the format and shows the right actions.
Choose
Pick convert, compress, edit, extract, or optimize.
Process
Your file moves through a clear processing pipeline.
Download
Save the final file when it is ready.
Three things that set
FormatOS apart.
Upload first. Always.
You don't browse tools — you drop a file. FormatOS reads it and shows what's possible. Nothing more, nothing less.
Your device does the work.
Most operations run in your browser. Images, PDFs, data files — processed locally. No unnecessary server round-trips.
Only real tools appear.
If a feature isn't available or an engine is offline, it doesn't show up. No fake buttons. No dead ends.
Honest processing, clear limits.
No vague promises. Here's exactly how your files are handled.
Browser-first
Images, PDFs, and most documents are processed in your browser. The file never leaves your device.
Temporary server only
When a server engine is needed, working files are cleaned up after processing completes.
No public links
FormatOS does not create galleries or shareable file links. Your output is yours alone.
Free to use
No signup, no paywall, no premium tier. Supported by non-intrusive ads only.
Practical answers.
Everything you need to know about using FormatOS.
No. Upload your file first and FormatOS detects the format automatically, then shows only the actions that make sense for that file. You never need to browse a tool directory or select a category before uploading.
FormatOS is a free upload-first file utility. Upload a file from your device, and FormatOS detects the format, checks practical readiness, and shows only safe actions that are actually available for that file.
Yes. FormatOS is free to use. Any limits shown are processing, file-size, browser, server, or safety limits — not paid-plan limits.
PDF documents, images (JPG, PNG, WebP, GIF, SVG), data files (CSV, TSV, JSON, XML, YAML, XLSX), plain text, Markdown, HTML, DOCX, ZIP archives, video files (MP4, MOV, WEBM, MKV, AVI), and audio files (MP3, WAV, AAC, OGG, M4A, FLAC) are recognized on upload. Most document, image, and data actions run in your browser.
Because only actions relevant to your specific file are shown. A PDF shows PDF tools. An image shows image tools. A CSV shows data conversion options. This keeps the interface focused and prevents irrelevant or broken actions from appearing.
Browser PDF tools include split pages, extract pages, remove pages, reorder pages, rotate pages, merge PDFs, add page numbers, add a text watermark, and remove common PDF metadata. PDF compression and PDF-to-image only appear when the required server engine is live-tested.
For browser-supported images, FormatOS can convert to JPG, PNG, and WebP, compress by quality or target size, resize, crop, rotate, flip, convert an image to PDF, and create fresh canvas exports that remove common EXIF metadata.
Where technically possible, files are processed in your browser. Some formats or conversions require temporary server processing. The interface shows when a server engine is required, and temporary server outputs are not public file-hosting links.
No. Metadata removal reduces common hidden file information, but it is not perfect anonymization. Review sensitive files before sharing them.
Lossy formats such as JPG and WebP may lose quality when compressed. Target-size compression is best-effort; very small targets can make text or images blurry. Review important outputs before submitting them.
Video files (MP4, MOV, WEBM, MKV, AVI) and audio files (MP3, WAV, AAC, OGG, M4A, FLAC) are recognized on upload. Media conversion, compression, trimming, extraction, and GIF output only appear when the required server engine is active.
No. FormatOS only processes files you upload from your own device. Downloading content from third-party video or social media platforms is not supported and will not be added.
No. FormatOS is an independent utility and is not affiliated with Adobe, Google, Microsoft, Apple, WhatsApp, or any government agency.