Data & file tools

CSV, PDF, ZIP, checksums and generators — processed entirely in your browser, so your files never leave your device.

Most popular

Auto Analyst: Instant Statistical Report

Drop a CSV or Excel file and get a statistician’s report: data problems, distributions, every real relationship, key drivers and Simpson’s paradox warnings, in plain English.

CSV Viewer & Editor

View, edit, sort, filter and extract columns from CSV files.

CSV ↔ JSON Converter

Convert CSV to JSON and JSON back to CSV.

Data Visualizer

29 chart types — heatmap, treemap, dumbbell, slope, candlestick — with rich styling and annotations.

EPUB Converter & Metadata Editor

EPUB → TXT or Markdown, edit metadata, export chapters.

Excel → CSV Converter

Convert XLSX/XLS sheets to clean CSV, per sheet.

File Hash Checker

SHA-256/SHA-1/MD5 of any file — verify downloads.

Images → PDF

Bundle JPG/PNG images into one PDF, one page each.

JSON Table Viewer

Paste JSON, get a sortable, searchable table.

JSON → Types Generator

Generate TypeScript, Python or Go types from JSON.

Markdown Table Generator

Paste spreadsheet data, get an aligned Markdown table.

PDF Merger

Combine several PDFs into one, in the order you choose.

PDF Splitter

Split a PDF into single pages or custom ranges.

PDF → Images

Render PDF pages to PNG or JPEG, single or ZIP.

SQL Playground

Run real SQL on CSV, Excel and Parquet files in your browser.

Test Data Generator

Fake names, emails, addresses — CSV or JSON datasets.

WhatsApp & Telegram Chat Analyzer

Upload a chat export: stats, heatmaps, reply times and a shareable dashboard card.

ZIP Creator & Extractor

Build ZIP archives and unpack them, all in the browser.

CSV & Tables

Auto Analyst: Instant Statistical Report

Drop a CSV or Excel file and get a statistician’s report: data problems, distributions, every real relationship, key drivers and Simpson’s paradox warnings, in plain English.

CSV Viewer & Editor

View, edit, sort, filter and extract columns from CSV files.

CSV ↔ JSON Converter

Convert CSV to JSON and JSON back to CSV.

Data Visualizer

29 chart types — heatmap, treemap, dumbbell, slope, candlestick — with rich styling and annotations.

Excel → CSV Converter

Convert XLSX/XLS sheets to clean CSV, per sheet.

JSON Table Viewer

Paste JSON, get a sortable, searchable table.

Markdown Table Generator

Paste spreadsheet data, get an aligned Markdown table.

SQL Playground

Run real SQL on CSV, Excel and Parquet files in your browser.

Data Anonymizer

Mask, hash or fake selected columns of a CSV.

Fabricated Number Detector

Digit forensics: spot invented numbers by their last digits, doubles and round endings.

Pivot Table Maker

Group and aggregate CSV data — no spreadsheet needed.

Parquet & Feather Preview

Peek inside Parquet and Arrow/Feather files without Python.

PDF Tools

Images → PDF

Bundle JPG/PNG images into one PDF, one page each.

PDF Merger

Combine several PDFs into one, in the order you choose.

PDF Splitter

Split a PDF into single pages or custom ranges.

PDF → Images

Render PDF pages to PNG or JPEG, single or ZIP.

PDF Booklet Imposition

Reorder a PDF into fold-and-staple booklet spreads, 2-up for duplex printing.

PDF Compressor

Shrink a PDF by re-encoding its images in the browser.

PDF Metadata Viewer & Stripper

See and remove a PDF's hidden metadata.

PDF Page Extractor

Pull selected pages out into a new PDF.

PDF Rotator

Rotate all pages or selected pages by 90/180/270°.

Poster Printer (Tile Across Pages)

Print an image or PDF as a big poster split across A4 or Letter pages, with overlap, cut marks and page labels.

Files & Archives

EPUB Converter & Metadata Editor

EPUB → TXT or Markdown, edit metadata, export chapters.

File Hash Checker

SHA-256/SHA-1/MD5 of any file — verify downloads.

WhatsApp & Telegram Chat Analyzer

Upload a chat export: stats, heatmaps, reply times and a shareable dashboard card.

ZIP Creator & Extractor

Build ZIP archives and unpack them, all in the browser.

Hex Viewer

Inspect any file byte by byte, offsets + hex + ASCII.

Generators & Formats

JSON → Types Generator

Generate TypeScript, Python or Go types from JSON.

Test Data Generator

Fake names, emails, addresses — CSV or JSON datasets.

XML Formatter & Validator

Pretty-print, minify and validate XML.

iCalendar Generator & Parser

Create .ics event files and inspect existing ones.

vCard Generator & Parser

Create .vcf contact files and inspect existing ones.

About these tools

Data and file utilities for everyday wrangling: convert between CSV, JSON and spreadsheet formats, visualize data as charts, clean and deduplicate tables, and inspect file contents. Files are parsed locally in your browser, so datasets never leave your machine.