Data5U Tools ยท Free Online Toolbox
Free online toolbox: text processing, encoding & hashing, developer tools, image tools, date & calculators. Everything runs locally in your browser - no uploads, privacy safe.
๐ฅ Popular Tools
Text DeduplicatorRemove duplicate lines from text, with case-insensitive and order-preserving optionsCase ConverterConvert text to UPPER, lower, Title, camelCase or snake_caseWord & Character CounterCount characters, words, lines, CJK chars and bytes in real timeLine SorterSort lines alphabetically, numerically or by length; reverse and shuffle supportedText ReverserReverse text by character, word or lineBlank Line & Whitespace CleanerStrip blank lines, leading/trailing spaces, extra spaces and tabsFull/Half Width ConverterConvert between fullwidth and halfwidth charactersText Diff CheckerCompare two texts line by line with highlighted differences
๐ Text Tools8 tools
Text DeduplicatorRemove duplicate lines from text, with case-insensitive and order-preserving optionsCase ConverterConvert text to UPPER, lower, Title, camelCase or snake_caseWord & Character CounterCount characters, words, lines, CJK chars and bytes in real timeLine SorterSort lines alphabetically, numerically or by length; reverse and shuffle supportedText ReverserReverse text by character, word or lineBlank Line & Whitespace CleanerStrip blank lines, leading/trailing spaces, extra spaces and tabsFull/Half Width ConverterConvert between fullwidth and halfwidth charactersText Diff CheckerCompare two texts line by line with highlighted differences
๐ Encoding & Hash7 tools
Base64 Encoder / DecoderEncode or decode Base64 with full UTF-8 support, fully localURL Encoder / DecoderPercent-encode or decode URLs and query stringsUnicode ConverterConvert text to/from \uXXXX escape sequencesMD5 Hash GeneratorCompute MD5 hash (32/16 chars) locally in your browserSHA Hash GeneratorCompute SHA-1/256/384/512 hashes via Web Crypto APIHTML Entity EncoderEscape or unescape HTML special characters and entitiesMorse Code TranslatorTranslate text to and from Morse code
๐ป Developer7 tools
JSON FormatterFormat, minify and validate JSON with custom indent and key sortingRegex TesterTest regular expressions live with match highlighting and capture groupsJWT DecoderDecode JWT header and payload with expiry time (local only, no signature check)Unix Timestamp ConverterConvert between Unix timestamps and dates, seconds or millisecondsRadix ConverterConvert between binary, octal, decimal, hex and any base 2-36UUID GeneratorGenerate UUID v4 identifiers in bulk, with uppercase and no-hyphen optionsMarkdown PreviewerPreview Markdown in real time: headings, lists, code blocks, tables and links
๐ผ๏ธ Image Tools6 tools
Image CompressorCompress JPG/PNG/WebP images locally with quality and max-width controlImage Format ConverterConvert between PNG, JPG and WebP via local CanvasImage ResizerResize images by pixels or percentage with aspect-ratio lockImage to Base64Convert images to Base64 Data URL for CSS or HTML embeddingImage Color PickerPick colors from images, show HEX/RGB/HSL, supports EyeDropper APIColor ConverterConvert between HEX, RGB and HSL with live preview
๐ Date & Time4 tools
๐งฎ Calculators6 tools
BMI CalculatorCalculate body mass index and healthy weight rangeLoan / Mortgage CalculatorCalculate monthly payment and total interest for equal payment and equal principalUnit ConverterConvert length, weight, temperature, area, speed and data unitsRandom Number GeneratorGenerate random numbers in a range, with unique and bulk optionsPercentage CalculatorCommon percentage calculations: share, change and base valueStopwatchPrecise online stopwatch with lap and pause support