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All 98 free tools on Sofritools, organized by category.
No signup, no trackingData & code (28)
JSON Formatter & ValidatorPretty-print, validate, and minify JSON instantly.CSV to JSON ConverterConvert CSV to JSON with automatic delimiter detection.Base64 Encode / DecodeEncode and decode Base64 with full UTF-8 support.URL Encode / DecodePercent-encode or decode URLs and query strings.Unix Timestamp ConverterConvert Unix epochs to human dates and back.JSON ↔ YAML ↔ TOML ConverterConvert between JSON, YAML, and TOML in any direction.JWT DecoderDecode a JWT’s header, payload, and expiry instantly.Regex TesterTest JavaScript regular expressions with live highlighting and groups.Cron Expression ParserExplain any crontab schedule and preview its next run times.Number Base ConverterConvert between binary, octal, decimal, hex, and any base up to 36.HTML Entity Encoder / DecoderEscape or unescape HTML entities instantly as you type..env ↔ JSON ConverterConvert dotenv files to JSON and back, quotes and comments included.CSV to SQL ConverterCREATE TABLE and INSERT statements from any CSV, in your browser.Mexican RFC Validator (SAT)Validate RFC tax IDs in bulk — structure, date, and the SAT check digit.Mexican CURP ValidatorValidate Mexican CURP identifiers in bulk — structure, date, state code and the RENAPO check digit.Chilean RUT ValidatorValidate Chilean RUT numbers in bulk — format and check digit.Dominican Cédula ValidatorValidate Dominican cédula numbers in bulk — format and check digit.Spanish DNI & NIE ValidatorValidate Spanish DNI and NIE numbers in bulk — format and check letter.JSON to SQL ConverterConvert a JSON array of objects into CREATE TABLE + INSERT statements for any database engine.SQL FormatterFormat and beautify messy SQL queries with proper indentation, keyword casing, and line breaks — or minify them to a single line.XML Formatter & ValidatorPretty-print, minify and validate XML — no upload, no account, works on any well-formed document.CSV CleanerClean messy CSV files — trim whitespace, remove empty and duplicate rows, fix quoting, and normalize formatting.CSV Column SelectorPick the columns you need, drop the rest, reorder — done.Data AnonymizerMask, redact, hash, or shuffle columns — all in your browser.Pivot Table ToolUpload CSV, pick rows/columns/values, and pivot — no spreadsheet needed.Excel ↔ CSV ↔ JSON ConverterConvert between .xlsx, .csv, and .json — all in your browser.Excel → SQL GeneratorUpload .xlsx or .csv — get CREATE TABLE + INSERT for 5 SQL dialects.Avro & Protobuf Schema InspectorPaste an .avsc or .proto file and see fields, types, and structure.
Text (14)
Case ConverterUPPER, lower, Title, camelCase, snake_case, kebab-case.Word CounterWords, characters, sentences, and reading time — live.URL Slug GeneratorTurn any title into a clean, SEO-friendly URL slug.Remove Accents from TextStrip accents and diacritics: á→a, ñ→n, ü→u.Text Diff CheckerCompare two texts line by line and spot every change.Roman Numeral ConverterConvert between Arabic numbers and Roman numerals, 1 to 3999 — both directions, live.Remove Duplicate Lines & SortDeduplicate, sort, shuffle, and clean up any list of lines.Markdown to HTML ConverterConvert Markdown to clean HTML with a live, sandboxed preview.Character CounterCount characters and see how your text fits X, Instagram, YouTube, Google Ads, and more.Text Cleaner & FormatterStrip hidden formatting, smart quotes, and invisible characters from pasted text.Email ExtractorPull every email address from a block of text — deduplicated and sorted.Readability Score CheckerFlesch-Kincaid, Gunning Fog, and Coleman-Liau scores — instantly.Number to WordsConvert numbers to written words — checks, invoices, legal docs.Speaking Time EstimatorPaste your text and see how long it takes to speak or read.
Generators (11)
Hash Generator (SHA-256, SHA-512)Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes.UUID GeneratorGenerate one or hundreds of random UUIDs (v4).Password GeneratorStrong random passwords, generated locally.QR Code GeneratorCreate QR codes — no watermark, no sign-in, no tracking, no expiration.Lorem Ipsum GeneratorGenerate placeholder text by paragraphs, sentences, or words.Mock Data GeneratorGenerate realistic fake data as JSON, CSV, or SQL.Random Spinning WheelEnter names, spin the wheel, pick a winner.Random Name PickerPaste a list, pick one or more items at random.Random Group & Team GeneratorPaste names and split them into random balanced teams or groups.Barcode GeneratorBarcodes as SVG and PNG — no watermark, no sign-up.SKU GeneratorBuild product SKU codes from configurable segments.
Web & design (22)
Color Converter (HEX, RGB, HSL)Convert any CSS color between HEX, RGB, and HSL with a live preview.Color Palette ExtractorPull the dominant colors from any image — right in your browser.Meta Title & Description CheckerCheck title and description length in pixels, with a live Google preview.User-Agent ParserDetect browser, engine, OS, and device from any user-agent string.Favicon Generator (ICO + PNG)Turn any image into a multi-size favicon.ico plus PNG icons.WebP to JPG & PNG ConverterTurn that .webp download into a file your software will open.Convert Images to WebPTurn PNG and JPG into WebP in bulk, and see the real size change.Remove EXIF Data & View Photo MetadataSee every hidden field in a photo, then strip it without re-encoding a pixel.Compress an Image to an Exact File SizeType the number the upload form demands and the page searches for the quality that lands there.Resize Image to Any SizeSet an exact width and height, scale by percent, or fit within a box — one photo or a whole folder, without a single upload.Crop an Image — Rectangle, Circle & ShapesDrag a crop box or mask a perfect circle, and download a PNG whose corners are actually transparent.Convert SVG to PNGRasterize a vector at any pixel size, with transparency kept — no upload.AVIF to JPG & PNG ConverterTurn an .avif file your software won’t open into a normal JPG or PNG.UTM Link BuilderBuild Google Analytics campaign URLs with UTM parameters — instantly.Keyword Density CheckerSee which words and phrases appear most in your text — with frequency and density.Contrast Ratio Checker (WCAG)Check if your text and background colors meet WCAG AA and AAA standards.Schema / JSON-LD ValidatorPaste JSON-LD structured data and validate its structure.Robots.txt TesterPaste your robots.txt and test URLs against it.Hreflang Tag GeneratorEnter URLs per language and generate hreflang link tags.Sitemap XML GeneratorPaste URLs and generate a valid XML sitemap — download ready.Open Graph PreviewPaste meta tags and preview social media share cards.Social Media Image ResizerResize images for Instagram, Facebook, Twitter, LinkedIn, YouTube.
Calculators (23)
Percent Error CalculatorCheck a measured value against the expected one — percent error, absolute error, and over/under direction, plus the Excel, Sheets, and SQL formulas.Percent Change CalculatorFind the percent change between an old and a new value — signed, with an increase or decrease label — plus the absolute change, the symmetric percent difference, and the Excel, Sheets, and SQL formulas.CAGR CalculatorCompute the compound annual growth rate from a beginning value, an ending value, and a number of years — plus total growth and the growth multiple — with the Excel, Sheets, and SQL formulas.Puerto Rico Sales Tax Calculator (IVU)Add or back out Puerto Rico's 11.5%, 7% or 4% IVU, with the state and municipal breakdown.VAT Calculator (Mexico, Spain & Latin America)Add or back out VAT for 18 countries — with the rate presets and currency each one actually uses.Margin & Markup CalculatorCalculate profit margin, markup percentage, and profit from cost and revenue.Salary to Hourly ConverterConvert between annual salary, monthly, biweekly, weekly, daily, and hourly rates.ROI CalculatorCalculate return on investment, net profit, and annualized ROI — instantly.Break-Even CalculatorHow many units to sell — or how much revenue to earn — to cover all costs.BMI CalculatorStandard BMI, Trefethen New BMI, WHtR, and BRI in one tool.Price per Sq Ft / Sq MCalculate price per square foot or square meter. Compare two properties.Percentage CalculatorCalculate percentages three ways — what is X% of Y, X is what % of Y, and X is Y% of what.Date Difference CalculatorFind the exact time between two dates — in days, weeks, months, years, hours, minutes, and seconds.Descriptive Statistics CalculatorMean, median, mode, standard deviation, variance, quartiles — from any dataset.Weighted Average CalculatorEnter values and weights to get the weighted mean instantly.Z-Score CalculatorCalculate z-score from value, mean, and standard deviation — with percentile lookup.Age CalculatorEnter your birthdate and see your exact age plus fun stats.Unit ConverterConvert between metric, imperial, and digital units instantly.Tip CalculatorCalculate tip amount and split the bill among any number of people.Puerto Rico Paycheck CalculatorEstimate net pay after PR income tax, FICA, and local deductions.Military Time ConverterConvert between military time (24-hour) and standard time (12-hour AM/PM) — both directions, live.Work Hours Calculator (Timesheet)Weekly or biweekly timesheet: clock in, clock out, break minutes → hours worked and pay.Loan CalculatorMonthly payment, total interest, and full amortization schedule.
Reference tables
Cron Expression Examples84 crontab schedules with the exact times each one fires.Unix Timestamp Reference: Epoch Values and ConversionsNotable epoch values, per-database SQL conversions and the 2038 limits.Regex Cheat Sheet: Syntax Tables and Ready-Made PatternsRegex syntax in tables, plus patterns tested before publishing.HTML Entities List192 characters with their named, decimal and hexadecimal codes.CSS Color Names, Hex and RGB CodesAll 148 CSS color keywords with hex, RGB and HSL values.Binary, Octal, Decimal and Hex Conversion TableBinary, octal, decimal and hex side by side, from 0 to 65536.Social Media Image Sizes — 2026 Cheat SheetEvery platform dimension in one table: Instagram, Facebook, X, LinkedIn, YouTube, TikTok, Pinterest and Threads.Favicon Sizes — Complete Cheat SheetEvery favicon size that matters in 2026 — and the four files that cover them all.UTM Parameters — Complete ReferenceThe five parameters, the source/medium conventions, and how GA4 turns them into channels.Words per Minute — Speech Length TableHow many words fit in a speech of any length, from 30 seconds to an hour, at three speaking paces.ASCII Table — Complete 0–127 ReferenceEvery ASCII character with its decimal, binary, hexadecimal and octal value — plus the control codes.Margin vs Markup Chart — Conversion Table & FormulasEvery markup percentage converted to its margin — and the two formulas everybody confuses.Z-Score Table — Standard Normal DistributionLook up the area to the left of any z-score, positive or negative, to four decimal places.