Merge PDF
Combine several PDF files into one, in any order.
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40Merge PDFSplit PDFPDF to JPGJPG to PDFCompress PDFPDF RedactionJSON FormatterMock API ServerMarkdown EditorYAML EditorBase64 Encode / DecodeJWT DecoderHash GeneratorUnix Timestamp ConverterDocument ScannerImage EditorImage ConverterApp Icon GeneratorQR Code GeneratorUUID GeneratorText Diff CheckerFunction PlotterEquation EditorText ToolkitCSV Viewer & ConverterPassword GeneratorURL CleanerImage Privacy CleanerUnit ConverterDate CalculatorScientific CalculatorCompassBubble LevelEMI CalculatorSIP CalculatorLoan Prepayment CalculatorInvestment Return CalculatorFD & RD CalculatorPDF OrganizerPDF Sign & Watermark
PRIVATE · FAST · NO SIGNUP
Free online tools for everyday tasks
Fast, private tools that process your files in the browser—no account, no uploads, and nothing leaves your device.
40 tools available
Popular tools
Split PDF
Extract page ranges or split a PDF into pages.
PDF to JPG
Convert each PDF page into a JPG image.
JPG to PDF
Combine images (JPG/PNG) into a single PDF.
Compress PDF
Shrink PDF file size by re-rendering pages.
PDF Redaction
Permanently remove sensitive areas from PDF pages.
PDF Organizer
Reorder, rotate, duplicate and delete pages.
PDF Sign & Watermark
Sign, watermark and number PDF pages.
Scan
Image
Finance
EMI Calculator
Estimate monthly loan payments and total interest.
SIP Calculator
Estimate monthly investment growth and returns.
Loan Prepayment Calculator
Compare lower EMI with a shorter loan tenure.
Investment Return Calculator
Calculate profit, absolute return and CAGR.
FD & RD Calculator
Estimate deposit maturity and interest earned.
Productivity
QR Code Generator
Make QR codes for URLs, Wi-Fi, text & more.
UUID Generator
Generate random v4 UUIDs in bulk.
Text Diff Checker
Compare two text versions and highlight every change.
Compass
Find direction using your phone's orientation sensor.
Bubble Level
Check horizontal and vertical alignment with your phone.
Developer
JSON Formatter
Format, validate, minify & explore JSON.
Mock API Server
Design endpoints and simulate JSON API responses locally.
Markdown Editor
Write Markdown with a live preview and export.
YAML Editor
Format, validate and convert YAML to JSON.
Base64 Encode / Decode
Convert text & files to and from Base64.
JWT Decoder
Decode and inspect JSON Web Token claims.
Hash Generator
SHA-1/256/384/512 checksums of text.
Unix Timestamp Converter
Convert between Unix time and human dates.
Text Toolkit
Clean, transform, sort and analyze text.
CSV Viewer & Converter
Preview, clean, filter and convert CSV or TSV.
Password Generator
Create strong cryptographic passwords locally.
URL Cleaner
Remove advertising and analytics tracking parameters.
Maths
Calculators
One private toolkit for files, data and calculations
OpenToolkit brings practical PDF tools, image utilities, developer tools and finance calculators together in one fast website. Most work happens directly on your device, which means you can finish common tasks without creating an account or sending files to a remote service.
Useful every day
Convert files, clean data, calculate repayments and generate common formats in seconds.
Designed for privacy
Tools use browser technology wherever possible so sensitive files and text stay under your control.
Free and accessible
No installation or signup. Open a tool in any modern desktop or mobile browser.
Frequently asked questions
Are OpenToolkit tools free?
Yes. The tools listed here are free to use and do not require an account.
Are my files uploaded?
OpenToolkit is built to process work locally in your browser whenever the feature allows it. Each tool explains its behavior where relevant.
Which browsers are supported?
A current version of Chrome, Edge, Firefox or Safari is recommended, especially for file and camera tools.