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35 free tools that run in your browser

Developer utilities, PDF and image tools, text helpers, and India finance calculators. Nothing you enter or open is uploaded.

Developer10

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JSON Formatter & ValidatorFormat, beautify, validate and minify JSON online. Colour-coded keys and values, error line numbers, sort keys. Runs in your browser, nothing is uploaded.JWT DecoderDecode a JWT token online and read its header, payload and expiry time. Runs locally in your browser, so your token is never sent anywhere.Base64 Encode / DecodeEncode text to Base64 or decode Base64 to text online. Handles UTF-8, emoji and URL-safe Base64. Private, runs in your browser.Unix Timestamp ConverterConvert Unix timestamps to readable dates and dates to epoch time. Supports seconds and milliseconds, UTC, ISO 8601 and local time.URL Encode / DecodePercent-encode text for URLs or decode %20 style strings. Separate options for query values and full URLs. Free, private, in your browser.Regex TesterTest regular expressions online with live match highlighting, capture groups and flags. Uses the JavaScript regex engine. Free and private.UUID GeneratorGenerate random UUID v4 values in bulk, with or without hyphens, in upper or lower case. Uses your browser secure random generator.Diff CheckerCompare two texts or code snippets and see added and removed lines highlighted. Free online diff tool that never uploads your text.Cron Expression GeneratorBuild and explain cron expressions in plain English and see the next run times. Presets for every minute, hourly, daily and weekdays.Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text instantly. Computed in your browser, nothing is uploaded.

Calculators11

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EMI CalculatorCalculate loan EMI, total interest and total payment in rupees. Works for home loan, car loan and personal loan. Free EMI calculator for India.GST CalculatorAdd GST to a price or remove GST from an inclusive amount. Shows CGST, SGST and total at 5%, 18% and 40% slabs. Updated for GST 2.0.SIP CalculatorCalculate mutual fund SIP returns with an optional yearly step-up. See invested amount, estimated returns and total value for any tenure.HRA CalculatorCalculate your HRA exemption with the lowest-of-three rule. Updated for FY 2026-27, when 8 cities get the 50% metro limit. Old regime.Income Tax CalculatorCompare old and new tax regime for FY 2026-27. See tax, rebate, cess and which regime saves you more. Free income tax calculator for India.FD CalculatorCalculate fixed deposit maturity amount and interest earned with quarterly compounding. Free FD calculator for India.RD CalculatorCalculate recurring deposit maturity amount and interest for a monthly deposit, with quarterly compounding. Free RD calculator.PPF CalculatorCalculate PPF maturity value for 15 years or more. Yearly deposit up to 1.5 lakh at the current rate. Free PPF calculator India.Gratuity CalculatorCalculate gratuity from last drawn salary and years of service using the 15/26 formula. Shows the tax-free limit of 20 lakh.In-Hand Salary CalculatorConvert annual CTC to monthly in-hand salary after PF, professional tax and income tax. Old and new regime. Free salary calculator for India.Age CalculatorCalculate your exact age in years, months and days from date of birth. Find your age on any date, total days lived, and your next birthday.

Image & PDF6

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100% client-side. Your data never leaves this tab, so it is safe to paste real payloads and tokens or open private files.