Fast, Private Structured Data Converter
Convert JSON, CSV, Excel & XML instantly in your browser — 100% private, zero cost, and zero server uploads.
Drop your JSON file here or browse
Drag and drop from your computer, browse, or pasteCtrl / ⌘ + V
Leaderboard (728 × 90)
Popular Conversion Tools
Dedicated landing pages optimized for high-traffic file format transformations.
JSON to Excel
Free online JSON to Excel converter. Cleanly flattens nested objects and arrays into structured XLSX worksheets with zero data uploaded to external servers.
XML to Excel
Convert XML files to Excel spreadsheets (.xlsx) online for free. Automatically detects XML record repeating nodes and converts attributes into structured spreadsheet columns.
CSV to Excel
Free online CSV to Excel converter. Auto-detects delimiters (comma, semicolon, tab), preserves leading zeros and dates, and outputs clean .xlsx workbooks.
Excel to JSON
Convert Excel to JSON online for free. Extracts XLSX and XLS worksheet rows into JSON arrays of objects with zero data retention and instant client-side download.
Excel to CSV
Free online Excel to CSV converter. Converts XLSX and legacy XLS spreadsheets to UTF-8 CSV with custom delimiters, quote escaping, and instant browser processing.
PDF to Excel
Extract structured tables from PDF documents into Excel spreadsheets (.xlsx). Advanced table detection for invoices, receipts, and bank statements.
Tally XML to Excel
Free online Tally XML to Excel converter. Parse Tally Prime and Tally ERP 9 XML daybooks, ledgers, and voucher reports into structured Excel spreadsheets.
Parquet to Excel
Free in-browser Parquet to Excel converter powered by DuckDB-Wasm. Convert analytics datasets, Snappy compressed Parquet, and Databricks/AWS Athena exports to XLSX instantly.
Parquet to CSV
Convert Parquet to CSV online in your browser. Fast, private, and powered by DuckDB-Wasm with custom delimiter support and instant download.
Parquet to JSON
Convert Parquet to JSON online for free. In-browser DuckDB engine converts columnar Parquet into structured JSON arrays of objects with optional formatting.
CSV to Parquet
Free online CSV to Parquet converter. Compress large CSV files into high-performance columnar Apache Parquet format using in-browser WebAssembly.
JSON to Parquet
Convert JSON to Parquet online for free. Compress JSON arrays into columnar Apache Parquet files using DuckDB WebAssembly with zero data leakage.
JSONL to Excel
Free online JSONL to Excel converter. Convert newline-delimited JSON (NDJSON) files into formatted XLSX worksheets with instant in-browser DuckDB processing.
JSONL to CSV
Convert JSONL to CSV online for free. Fast, in-browser conversion of NDJSON datasets into RFC 4180 compliant CSV files with custom delimiters.
CSV to JSONL
Free online CSV to JSONL converter. Convert CSV rows into individual newline-delimited JSON objects ready for LLM fine-tuning and big data pipelines.
Free Online Calculators & Developer Tools
18 specialized financial, developer, and everyday math calculators executing 100% in your browser.
Base64 Encoder & Decoder
Encode plain text or binary data into Base64 format, or decode Base64 strings back to text directly in your browser.
JSON Formatter & Validator
Format, beautify, minify, and validate JSON payloads with accurate syntax error highlighting and tree structure viewing.
URL Encoder & Decoder
Safely encode special characters for query parameters or decode percent-encoded URLs back to human-readable strings.
Cryptographic Hash Generator
Generate secure cryptographic message digests and checksums for strings and passwords using native Web Crypto APIs.
Unix Timestamp Converter
Convert Unix epoch timestamps (seconds and milliseconds) to UTC and local human-readable calendar dates, or vice versa.
Color Code Converter (HEX, RGB, HSL)
Convert color formats between HEX, RGB, RGBA, and HSL with live visual swatch preview and CSS snippet generators.
SIP Calculator
Calculate expected future returns on your monthly Systematic Investment Plan (SIP) investments with compound interest growth projections.
EMI Calculator
Calculate your monthly Equated Monthly Installment (EMI), total interest payable, and overall loan repayment schedule.
Compound Interest Calculator
Forecast exponential savings growth with customizable compounding intervals (annual, quarterly, monthly, daily) and regular deposits.
GST Calculator
Calculate Goods and Services Tax (GST) effortlessly. Add or remove tax with standard slabs (5%, 12%, 18%, 28%) or custom rates.
Percentage Calculator
Solve all percentage math instantly: calculate percentage of a number, percentage increase/decrease, and what percent X is of Y.
Discount & Sale Price Calculator
Calculate final sale prices, dollar savings, and stacked coupon discounts during shopping sales and wholesale purchases.
Chronological Age Calculator
Calculate your exact chronological age from your date of birth down to the minute, with upcoming birthday countdowns and milestones.
Date Difference & Duration Calculator
Calculate the exact number of days, weeks, months, and working business days between any two calendar dates.
BMI Calculator (Body Mass Index)
Calculate your Body Mass Index (BMI) using metric (kg/cm) or imperial (lbs/feet) measurements with WHO classification charts.
Universal Unit Converter
Instantly convert between metric and imperial units across length, mass, temperature, area, volume, speed, and time.
Tip & Bill Splitter Calculator
Calculate restaurant tips, service charges, and split bill totals evenly among friends or colleagues with custom tip percentages.
Data Size & Byte Converter
Convert digital storage units between Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, and Petabytes using Binary or Decimal standards.
Salary & Take-Home Paycheck Calculator
Calculate monthly take-home in-hand salary from gross CTC after deducting provident fund (PF), professional tax, and income taxes.
Income Tax Slab Calculator
Estimate your income tax liability across progressive tax slabs with standard deduction and cess calculations.
JWT Token Inspector & Decoder
Decode and inspect JSON Web Tokens (JWT) headers, claims, issued timestamps, and expiration status with 100% client-side privacy.
UUID / GUID v4 Batch Generator
Generate cryptographically secure random Universally Unique Identifiers (UUID v4 / GUID) individually or in bulk with custom formats.
Profit Margin & Markup Calculator
Calculate gross profit margin percentage, markup percentage, cost of goods, and selling price for retail and wholesale business.
Return on Investment (ROI) Calculator
Calculate simple and annualized Return on Investment (ROI) percentage and total capital gains across business ventures and stocks.
WebP to PNG Converter
Convert Google WebP images to high-definition transparent PNG files directly in your web browser with 100% privacy.
PNG to WebP Converter
Convert PNG images to next-gen WebP format with configurable compression and transparency support to speed up website load times.
JPEG to PNG Converter
Convert JPG and JPEG photos to uncompressed PNG format for clean editing, overlaying, and graphics design.
Image Resizer & Compressor
Compress and resize WebP, PNG, and JPEG images to exact pixel widths and target file sizes directly in browser memory.
SVG to PNG Rasterizer
Render scalable vector graphics (SVG) into crisp transparent PNG images at any custom resolution up to 4K.
Merge PDF Online
Combine multiple PDF documents into a single organized PDF file in seconds directly in your web browser.
Split PDF & Extract Pages
Separate specific pages or custom page ranges from any PDF document quickly and securely in your browser.
Watermark PDF Online
Protect your intellectual property by stamping custom text watermarks like CONFIDENTIAL or DRAFT onto every PDF page.
Add Page Numbers to PDF
Stamp clean, professional page numbering onto every page of your PDF documents with customizable position and format.
PDF Table & Text Extractor to Excel
Parse structured text and tables from PDF documents and export directly to clean Excel (.xlsx) or CSV spreadsheets.
Mortgage Calculator & Amortization Schedule
Calculate monthly payments with principal, interest, property taxes, home insurance, and PMI. Export complete month-by-month amortization schedules directly to Excel (.xlsx).
Auto & Car Loan Calculator
Calculate monthly auto loan payments factoring in vehicle purchase price, dealer documentation fees, sales tax, trade-in equity, and down payment.
Retirement & 401(k) Nest Egg Calculator
Simulate your retirement nest egg growth with employer 401(k) matching, inflation-adjusted purchasing power, and post-retirement safe withdrawal longevity.
Inflation & Purchasing Power Calculator
Calculate how inflation erodes purchasing power over time, and determine the exact future dollar amount needed to maintain your standard of living.
In-Browser SQL Query Studio
Run lightning-fast analytical SQL queries directly against CSV, Parquet, Excel, and JSON files inside browser RAM with zero server uploads.
Spreadsheet & File Diff Checker
Compare two CSV or Excel spreadsheets side by side. Visually inspect added rows, deleted records, and changed cell values in color.
Client-Side Data Cleaner & PII Anonymizer
Mask customer emails, phone numbers, credit cards, and SSNs in CSV and Excel spreadsheets before sharing or training AI models. 100% private.
Built for Extreme Speed & Total Privacy
Traditional online converters upload your spreadsheets to remote servers. ConvertSheet does the heavy lifting in your browser.
100% Client-Side Privacy
Small files are transformed directly in your web browser using WebAssembly. Your confidential financial data and records never touch a server.
Zero Queue Latency
No waiting in backend worker queues. In-browser conversions execute in 50–200ms with instant one-click download triggers.
Zero Data Retention
We never store, log, or sell your documents. For Pro server conversions, files are auto-purged from encrypted memory after 15 minutes.
Developer REST API
Automate file ingestion pipelines in Python, Node.js, Zapier, and n8n with dedicated API keys, high throughput, and 99.9% uptime SLA.
Every Converter & Calculator is Free Forever
No credit cards, no monthly subscriptions, and no hidden file size limits. Run high-performance DuckDB transformations, financial projections, and developer formatting completely in your browser.
Horizontal Responsive (Responsive Banner)