Free tools for files and calculations

Convert an image, create a QR code or format JSON.

No account needed.

Tool categories

All tools

50 tools

Images and colorsHEIC to JPGConvert up to 10 HEIC or HEIF photos to JPG by default or to PNG when needed, locally in your browser.Synthetic dataTest Credit Card GeneratorGenerate fictitious credit card numbers for form tests using Luhn-compatible values.Synthetic dataIBAN & BIC GeneratorGenerate fictitious IBAN and BIC values by country for banking forms, QA, mockups and fixtures.Finance and validationVAT CalculatorConvert net price to gross price, calculate VAT or recover net price from gross.Synthetic dataFrench SIRET / SIREN GeneratorGenerate fictitious French SIREN and SIRET numbers with valid control keys for tests.Synthetic dataFrance Fake Address GeneratorGenerate coherent synthetic French addresses locally for forms, CRM, checkout and repeatable QA datasets.PDFImage to PDFConvert one or more JPG, PNG, HEIC or HEIF images into a PDF document.PDFMerge PDFMerge multiple PDF files into a single document.Finance and validationFrench VAT Generator & ValidatorGenerate a French VAT number from a valid SIREN or SIRET, then check its local format and key.Development and dataRegex TesterTest JavaScript regular expressions, flags, matches and replacements.Synthetic dataFake Identity GeneratorGenerate fictitious user profiles for form tests, prototypes, QA and mockups.QR codesQR Code TesterTest whether a QR code decodes and inspect URL security signals before printing or opening it.Finance and validationIBAN & BIC ValidatorCheck IBAN format, country length and checksum, or BIC structure.Development and dataJWT Decoder / EncoderDecode, inspect and regenerate test JSON Web Tokens with HS256.TextLorem Ipsum GeneratorGenerate placeholder text for wireframes, prototypes, templates and layout tests.Finance and validationSIRET / SIREN ValidatorValidate the length, structure and Luhn key of French SIREN or SIRET numbers.Development and dataTimestamp ConverterConvert Unix timestamps to readable dates and dates back to Unix time.Finance and validationLoan CalculatorEstimate loan payments, insurance, interest and financing cost from project amount, down payment, rate and duration.TextOnline Diff CheckerCompare two texts, JSON snippets or code blocks by line, word or character and highlight aligned additions and removals.Images and colorsColor ConverterConvert colors between HEX, RGB and HSL with a visual preview.Finance and validationGross Net Salary CalculatorEstimate monthly net salary from gross salary for French employee profiles.Development and dataJSON FormatterValidate JSON syntax and format JSON, XML or SQL snippets for debugging and documentation.Dates and timeTimezone ConverterCompare a date and time across Paris, London, New York, San Francisco, Tokyo, Sydney and UTC.Development and dataMD5 Hash GeneratorCalculate and compare the MD5 digest of UTF-8 text or local files for checksums, compatibility and legacy workflows.Images and colorsPNG to JPG ConverterConvert up to 20 PNG images to JPG with adjustable quality and a chosen transparency background.Development and dataUUID GeneratorGenerate UUID v4 identifiers for databases, APIs, fixtures and distributed systems.Development and dataURL Encoder / DecoderEncode or decode URLs, query strings and percent-encoded text.Dates and timeLive World ClockDisplay five to ten large world clocks at once in a customizable full-screen board.Finance and validationWorld Stock Market HoursTrack regular sessions, breaks, holidays and upcoming events across eight major world exchanges.Development and dataYAML JSON ConverterConvert YAML to JSON and JSON back to YAML for configuration and API workflows.Development and dataPassword GeneratorGenerate passwords with configurable length, letters, numbers and symbols.QR codesWi-Fi QR Code GeneratorCreate a Wi-Fi QR code for a network name, password, security type and hidden SSID.TextBase64 Encoder / DecoderEncode text to Base64 and decode Base64 back to readable text.Dates and timeDate Duration CalculatorCalculate exact days, weeks, months and years between two dates, or add and subtract date units.Development and dataCron Expression ParserParse a cron expression and preview upcoming run times.Synthetic dataFake French Company GeneratorGenerate coherent synthetic French company data with SIREN, SIRET, VAT, address, contact, IBAN/BIC and UUID.Finance and validationFrench Notary Fees CalculatorEstimate notary fees for a property purchase in France, old or new.TextWord CounterCount words, characters and term density, and estimate reading time in a text.QR codesvCard QR Code GeneratorCreate a contact QR code with name, phone, email, company, website and postal address.Development and data.env Example GeneratorCreate a .env.example by replacing variable values, then review it before sharing.Development and dataCSV JSON ConverterConvert CSV to JSON and JSON back to CSV directly in the browser.QR codesQR Code ReaderRead a QR code from an image or camera and inspect its exact content locally.Development and dataSHA256 / SHA512 GeneratorCalculate SHA-256, SHA-384 and SHA-512 hashes for text.Development and dataJSON to TypeScriptGenerate TypeScript interfaces from a representative JSON example.QR codesQR Code GeneratorCreate static QR codes for URLs, text, Wi-Fi, vCard, email, phone and SMS, then export PNG or SVG.TextMarkdown to HTMLConvert Markdown to readable HTML with a live preview.Images and colorsImage CompressorCreate a JPEG with adjustable quality and width, then compare its file size with the source.Images and colorsImage to WebP ConverterConvert up to 20 PNG, JPG, HEIC or HEIF images to WebP with adjustable output quality.Images and colorsJPG to PNG ConverterConvert up to 20 JPG or JPEG images to PNG locally in the browser.PDFSplit PDFExtract selected PDF pages into one document or create one PDF file per selected page.