Rubtin
Privacy-first browser toolkit for PDF, image, developer, and finance tasks, all processed locally.
Introduction
Rubtin is a free web utility suite whose tools run entirely in the browser with JavaScript. Files and text are not uploaded to a server. It covers PDF editing, image conversion, developer utilities, financial calculators, invoice generation, and local OCR, transcription, and sentiment tools.
- Added on
- Nov 2, 2026
- Website
- rubtin.com
- Pricing model
- Free
Product information
What is Rubtin?
Rubtin is a privacy-focused utility suite that performs document, image, and developer tasks client-side in the browser.
How to use Rubtin?
Open the site, pick a tool such as Merge PDF or Compress Image, and drop your files or paste text. Processing happens locally in the tab.
Core features of Rubtin
- Client-side processing with JavaScript
- PDF merge, split, compress, and conversion
- Image compress, resize, crop, and convert
- Developer tools such as JSON formatter, Base64, and hash
- Finance calculators and an invoice generator
- Local OCR text extraction and voice transcription
Use cases of Rubtin
- 1Merging contracts or scanned pages into one PDF without uploading them
- 2Reducing image file sizes locally
- 3Formatting and checking API payloads
- 4Generating invoices and printing them to PDF
- 5Extracting text from scanned documents locally
Frequently asked questions about Rubtin
How does Rubtin process files?+
Its tools run in the browser, and files stay in local memory rather than being sent to a remote server.
Is Rubtin free to use?+
Yes, the site describes its tools as free, with no watermarks and no stated file size caps or daily limits.
Does PDF compression reduce text quality?+
According to Rubtin, compression optimizes stream structures without altering vector content, so text stays clear and searchable.
Which category is Rubtin in?+
Rubtin is listed under AI PDF Tools.