Free Tools

Convert CSV data to JSON instantly — or reverse it. Paste text, upload a file, pick your format, and download the result. Everything runs in your browser; no data is sent to any server. Related tools: JSON to CSV Converter · JSON Formatter CSV → JSON JSON → CSV Options Delimiter Auto-detect Comma (,) Tab (\t) Semicolon (;) Pipe (|) Custom… Custom char Output format Array of objects Array of arrays Nested (group by first col) First row as headers Type inference Pretty print CSV Input drag & drop .csv Upload .csv No file chosen Convert to JSON Clear Load sample Rows: 0 Columns: 0 Delimiter detected: — Preview Table JSON Output Copied! Copy JSON Download .json Records: 0 Size: 0 B Options Output delimiter Comma (,) Tab (\t) Semicolon (;) Pipe (|) Include header row Quote all strings JSON Input Convert to CSV Clear Load sample CSV Output Copied! Copy CSV Download .csv Rows: 0 Columns: 0 Size: 0 B ...

Currency Converter Convert any amount between 12 major world currencies using reference exchange rates. ...

...

Convert any file to a Base64 data URL, or decode a data URL back to a downloadable file — all in your browser, no server, completely private. File → Data URL Data URL → File 📁 Drag & drop any file here, or click to browse ...

Free online date calculator with three modes: find the difference between two dates, add or subtract time from a date, and calculate business days. No sign-up required. Date Difference Add / Subtract Business Days Start Date End Date Calculate Difference Please enter both dates. Base Date Amount Unit Days Weeks Months Years Operation + Add − Subtract Calculate Date Please enter a base date and amount. Start Date End Date Weekends (Saturday & Sunday) are excluded. Public holidays are not automatically excluded. ...

Free tool — instantly calculate days until any date, business days, and more. ...

DNS Configuration Helper Enter your domain name, choose a preset configuration, and get ready-to-use DNS records. ...

The old "multiply by 7" rule is a myth. Dogs age rapidly in their first two years, then slow down. A 1-year-old dog is roughly equivalent to a 15-year-old human. This calculator uses size-adjusted research to give you a far more accurate estimate. Enter Your Dog's Details Age (Years) Age (Months) Breed Size Small (<10 kg / 22 lbs) Medium (10-25 kg / 22-55 lbs) Large (25-45 kg / 55-99 lbs) Giant (>45 kg / >99 lbs) Calculate Please enter a valid age (0-30 years). 🐾 -- Human-equivalent years -- Dog's Actual Age -- Size Category -- Avg. Lifespan --% Life Stage % Life Stage Timeline Puppy Junior Adult Mature Senior Geriatric Did You Know? Full Age Comparison Table Dog Age Small Medium Large Giant Related Free Tools BMI Calculator Calorie Calculator Sleep Calculator Life Expectancy Calculator Pet Food Calculator Related Tools Age Calculator Pregnancy Due Date Calculator ...

File Size & Speed Input Quick file size presets: MP3 Song (5 MB) Photo (10 MB) Document (25 MB) CD Image (700 MB) HD Movie (5 GB) 4K Movie (25 GB) PC Game (50 GB) Console Game (100 GB) File Size Unit KB (Kilobytes) MB (Megabytes) GB (Gigabytes) TB (Terabytes) Quick speed presets: 3G — 1 Mbps 3G — 5 Mbps 4G LTE — 25 Mbps 4G+ — 50 Mbps Wi-Fi — 100 Mbps Wi-Fi — 300 Mbps Fiber — 500 Mbps Fiber — 1 Gbps Internet Speed (Mbps) Please enter a valid file size and speed greater than zero. Calculate Download Time Speed Unit Converter Enter a value in any field — all others update automatically. Mbps MBps (MB/s) Kbps KBps (KB/s) Gbps Comparison Table Connection Type Speed — — — Table updates automatically when you calculate a file size above. Related Free Tools Bandwidth Calculator — plan your network capacity File Size Converter — bytes, KB, MB, GB, TB What is a good internet speed? Complete guide Data Usage Calculator — estimate your monthly usage Related Articles Best Internet Service Providers 2026: Speed & Price Compared

...