Tools
All tools
72 tools across documents, images, engineering, finance, and more — private by default.
Compress PDF
Reduce PDF file size directly in your browser.
Documents
Convert Image
Convert images between PNG, JPEG, and WebP formats.
Images
Engineering Unit Calculator
Convert length, pressure, torque, temperature, and more for CAD and engineering.
Engineering
FIRE Calculator
Estimate years to financial independence and your FIRE number.
Finance
JSON Formatter
Format, minify, and validate JSON instantly in your browser.
Developer
Merge PDF
Combine multiple PDF files into one document.
Documents
Organize PDF Pages
Reorder, rotate, delete, and duplicate PDF pages in one workspace.
Documents
Paper Weight Converter
Convert Bond, Text, Cover, Index, Bristol, Tag, and GSM for commercial print stock.
Commercial Print
PDF Metadata Editor
View and edit PDF Title, Author, Subject, Keywords, and Creator — plus page count, dates, and Info fields.
Documents
Regex Tester
Test JavaScript regular expressions with matches and groups.
Developer
Retirement Income Planner
Project savings, withdrawals, and retirement income with clear assumptions.
Finance
Split PDF
Extract pages or split every page into separate PDFs in your browser.
Documents
Word Unscrambler
Find words from letters with blank tiles and Scrabble scores.
Text
Add Page Numbers
Add customizable page numbers to PDF pages in your browser.
Documents
Amortization Schedule
Build a month-by-month loan schedule and export CSV.
Finance
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text.
Developer
Beam Load Calculator
Reactions, max moment, and optional deflection for a simply supported beam.
Engineering
Bearing Life Calculator
Estimate L10 bearing life from C, P, type, and speed.
Engineering
Bolt Torque Calculator
Estimate tightening torque from clamp force, diameter, and K factor.
Engineering
Break-even Calculator
Find the sales volume needed to cover fixed and variable costs.
Finance
Case Converter
Convert text between upper, lower, title, camel, snake, and more.
Text
Character Counter
Count characters, UTF-8 bytes, lines, and length budgets.
Text
Color Picker
Convert colors between HEX, RGB, and HSL.
Developer
Compound Interest Calculator
Project investment growth with compound interest.
Finance
Compress Image
Compress JPG, PNG, and WebP images directly in your browser.
Images
Cron Expression Builder
Build a 5-field cron expression with a short description.
Developer
Crop Image
Crop photos to the perfect frame and aspect ratio.
Images
Crop PDF
Crop PDF pages with presets or a custom rectangle in your browser.
Documents
Delete PDF Pages
Remove unwanted pages from a PDF in your browser.
Documents
Diff Viewer
Compare two texts with a line-based diff.
Developer
Duplicate Line Remover
Remove duplicate lines while keeping first or last occurrences.
Text
Electrical Calculator
Solve Ohm's law and power from any two known values.
Engineering
Extract Images from PDF
Pull embedded images out of a PDF and download them as PNG, JPEG, or ZIP.
Documents
Hash Generator
Create SHA-1, SHA-256, and SHA-512 hashes from text.
Developer
Hydraulic Force Calculator
Compute cylinder force from pressure and bore diameter.
Engineering
Inflation Calculator
Project purchasing power with a constant inflation rate.
Finance
Insert Blank Pages
Insert blank pages before or after any PDF page in your browser.
Documents
JPG to PDF
Convert JPG, PNG, and WebP images into a PDF.
Documents
JWT Decoder
Decode JWT header and payload locally — without verifying signatures.
Developer
Line Sorter
Sort lines alphabetically with trim and blank-line options.
Text
Loan Calculator
Estimate monthly payments and total interest for fixed-rate loans.
Finance
Markdown Preview
Preview a Markdown subset with safe HTML escaping.
Text
Material Density Calculator
Calculate density from mass and volume, or mass from a common material.
Engineering
Mortgage Calculator
Estimate monthly mortgage payments and total interest.
Finance
Net Worth Calculator
Sum assets and liabilities for a private net worth snapshot.
Finance
PDF Extract
Extract selected pages into a new PDF.
Documents
PDF Rotate
Rotate PDF pages left, right, or upside down.
Documents
PDF to JPG
Convert PDF pages into high-quality JPG images.
Documents
Pipe Flow Calculator
Solve flow rate or velocity with continuity Q = V × A.
Engineering
Pipe Volume Calculator
Calculate cylindrical pipe volume in liters and US gallons.
Engineering
Prompt Cleaner
Trim, tidy, and normalize a pasted AI prompt before you send it.
AI
Prompt Comparison
Compare two AI prompt drafts side by side — length, word counts, and word overlap.
AI
Prompt Formatter
Compose a clearly structured AI prompt from Role, Task, Context, Constraints, and Output format fields.
AI
Protect PDF
Password-protect PDFs with AES-256 encryption in your browser.
Documents
QR Code Generator
Generate a QR code for short URLs or text and download PNG.
Developer
Remove Image Metadata
Strip EXIF and other embedded metadata from images privately.
Images
Reorder PDF Pages
Drag and drop PDF pages into a new order.
Documents
Replace PDF Pages
Replace selected PDF pages with pages from another PDF in your browser.
Documents
Resize Image
Resize JPG, PNG, and WebP images instantly.
Images
Resize PDF Pages
Resize PDF pages to Letter, A4, and other standard paper sizes.
Documents
Rotate / Flip Image
Rotate or flip JPG, PNG, and WebP images in your browser.
Images
Screenshot Annotation
Draw arrows, boxes, and text on screenshots in your browser.
Images
Sign PDF
Add a typed, drawn, or uploaded signature to PDF pages in your browser.
Documents
SQL Formatter
Uppercase SQL keywords and add simple indentation.
Developer
Text Sanitizer
Clean and normalize plain-text content with Unicode, emoji, and punctuation preservation.
Text
Unlock PDF
Remove PDF password protection entirely in your browser.
Documents
UUID Generator
Generate secure UUID v4 identifiers in your browser.
Developer
Voltage Drop Calculator
Estimate DC/single-phase voltage drop for copper or aluminum.
Engineering
Watermark PDF
Add text or image watermarks to PDF pages in your browser.
Documents
Wire Gauge Calculator
Look up AWG diameter, area, and approximate ampacity.
Engineering
Word Counter
Count words, characters, sentences, and reading time.
Text
YAML ⇄ JSON Converter
Convert JSON to YAML and a practical YAML subset to JSON.
Developer