Simple tools that get the job done.
Free privacy-first PDF, image, QR, OCR, CSV, SQLite, ZIP, diagram, JSON, and text tools that run locally in your browser.
GuidesQR Design & Verification
Create a QR code with an optional logo, check that it scans, or read a QR image locally.
JSON Formatter
Validate and format JSON securely in your browser.
Mermaid Diagram Studio
Turn a written outline into a flowchart or another common diagram and download the result.
Image to Text OCR
Read text from an image locally with language-specific OCR.
Text Counter
Count characters, words, lines, and text size as you type.
Local PDF Workbench
Merge, reorder, rotate, remove, and extract PDF pages without uploading files.
Image Privacy Cleaner
Inspect EXIF, GPS, camera, and author metadata, then create clean copies locally.
Structured Data Workbench
Explore, compare, and organize JSON data locally without changing the source.
Image Compressor
Make JPEG, PNG, and WebP images smaller with simple size and clarity choices.
CSV Data Workbench
Open, search, sort, clean, and export CSV data locally in your browser.
cURL Code Converter
Turn a cURL command into working request code without sending credentials anywhere.
Text & JSON Difference Checker
Compare two texts or JSON documents and see exactly what changed.
SVG Optimizer & Inspector
Preview and reduce SVG files safely without uploading artwork.
Local ZIP Workbench
Inspect, extract, and create ZIP files entirely in your browser.
SQLite Database Viewer
Open a local SQLite database, browse tables, run read-only searches, and export results.
Markdown Mind Map
Turn a Markdown outline into an interactive mind map in your browser.
E-commerce Profit Calculator
Calculate per-order profit, margin, fees, refunds, and the break-even selling price.
Bulk Product Pricing
Price a product catalog from CSV using costs, fees, shipping, and a target margin.
Dimensional Weight Calculator
Compare actual and dimensional weight, then estimate two shipping options.
Sales Pipeline Calculator
Turn a revenue target into required deals, opportunities, leads, and pipeline coverage.
Sales Commission Calculator
Estimate progressive tier commission, quota attainment, and clawbacks.
ROAS, MER and CAC Calculator
Review advertising efficiency across revenue, orders, leads, customers, clicks, and margin.
Barcode Label Maker
Create printable Code 128, EAN-13, and UPC-A product labels locally.
Reorder Point Calculator
Estimate safety stock, reorder point, and a suggested order quantity.
Lead List Cleaner
Normalize, validate, and deduplicate email and phone leads from CSV without uploading them.
Fill & Sign PDF
Fill PDF form fields, place text and handwriting, then download a flattened copy without uploading the document.
Invoice, Quote & Packing Slip Maker
Turn item rows into a polished invoice, quote, or packing slip and print it as a PDF locally.
Product Image Batch Studio
Crop, resize, pad, watermark, rename, and export a batch of product photos as one ZIP.
Spreadsheet Cleaner & Converter
Open XLSX, ODS, or CSV, remove common data clutter, preview changes, and export a clean format.
Address Label Mail Merge
Merge CSV address data into printable Letter or A4 label sheets without uploading contacts.
Primary English Worksheets
Generate Fujian Education Press Grade 3–6 English practice, vocabulary lists, and handwriting sheets.
Primary Chinese Worksheets
Generate PEP Grade 3–6 Chinese word, pinyin, vocabulary, and handwriting practice.
Primary Math Worksheets
Generate PEP Grade 3–6 mental arithmetic sheets and textbook knowledge summaries.