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Transform images, data, text, dates, and files with fast tools that run locally—not on somebody else's server.

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Every tool in the kit

One predictable workflow across all 100 tools. Search above or scan by category.

100complete tools

Image tools

Resize, convert, inspect, and prepare images without uploading them.

01Resize imageChange image dimensions while preserving quality and aspect ratio.

02Compress imageReduce image file size with a visual quality control.

03Crop imageExtract an exact rectangular region from an image.

04Rotate & flip imageRotate by quarter turns and flip horizontally or vertically.

05Convert imageConvert images between JPG, PNG, and WebP.

06Add watermarkPlace a configurable text watermark on an image.

07Remove image metadataRe-encode visible pixels without carrying source metadata.

08Image to Base64Turn an image into a copyable data URL.

09Create faviconGenerate common favicon and app-icon PNG sizes in one ZIP.

10Extract color paletteFind dominant colors and copy reusable hex values.

26Grayscale imageConvert a color image to neutral grayscale tones.

27Invert image colorsCreate a photographic negative by reversing RGB values.

28Sepia imageApply a warm, classic sepia tone to an image.

29Adjust image brightnessLighten or darken an image with a precise slider.

30Adjust image contrastIncrease or soften the tonal separation in an image.

31Blur imageApply a configurable Gaussian-style blur to an image.

32Pixelate imageTurn image detail into crisp, adjustable pixel blocks.

33Add image borderFrame an image with a solid border of any color.

34Round image cornersClip an image to a configurable rounded rectangle.

35Image inspectorRead image dimensions, format, size, and aspect ratio.

Developer & data

Clean, convert, inspect, and generate everyday data formats locally.

11JSON formatterFormat minified JSON into readable, consistently indented text.

12JSON validatorCheck JSON syntax and get a precise, local result.

13JSON to CSVConvert an array of JSON records into CSV.

14CSV to JSONParse header-based CSV into a JSON array.

15Base64 encoder & decoderEncode or decode Unicode text safely with Base64.

16URL encoder & decoderEncode or decode URL components safely.

17UUID generatorGenerate one or many cryptographically random UUID v4 values.

18Hash generatorGenerate SHA-256, SHA-384, or SHA-512 hashes from text.

19JWT decoderInspect JWT header and payload claims without uploading the token.

20Unix timestamp converterConvert Unix timestamps and dates in local time and UTC.

36HTML entity encoder & decoderEncode reserved HTML characters or decode named entities.

37Hex text converterConvert UTF-8 text to hexadecimal bytes and back.

38Binary text converterConvert UTF-8 text to binary bytes and back.

39Unicode escape converterEscape Unicode code points or restore readable text.

40URL parserBreak a URL into protocol, host, path, query, and hash.

41Query string parserTurn URL query parameters into structured JSON.

42Color converterConvert CSS colors between HEX, RGB, and HSL.

43Number base converterConvert integers between bases 2 and 36.

44Regex testerTest a JavaScript regular expression against sample text.

45Text diff checkerCompare two text blocks line by line.

46YAML to JSONConvert YAML documents into formatted JSON.

47JSON to YAMLConvert valid JSON into readable YAML.

48XML formatterIndent compact XML into a readable document.

49XML to JSONConvert XML elements and attributes into JSON.

50JSON minifierRemove formatting whitespace from valid JSON.

Text tools

Count, normalize, sort, and reshape text directly in your browser.

21Word & character counterCount words, characters, sentences, lines, and reading time.

22Case converterConvert text into common writing and code naming styles.

23Duplicate-line removerRemove repeated lines while preserving the first occurrence.

24Line sorterSort text lines alphabetically or numerically.

25Slug generatorCreate clean URL slugs from titles and phrases.

51Find & replaceReplace literal text or regular-expression matches.

52Whitespace cleanerNormalize spaces, tabs, blank lines, and line endings.

53Reverse textReverse visible characters using Unicode-aware segmentation.

54Reverse linesReverse line order while leaving each line unchanged.

55Randomize linesShuffle a list using browser cryptographic randomness.

56Sort wordsExtract and sort words alphabetically or by length.

57Remove punctuationStrip punctuation while retaining letters, numbers, and spacing.

58Word frequency counterCount repeated words and rank them by frequency.

59Extract email addressesFind email-like addresses in pasted text.

60Extract URLsFind HTTP and HTTPS links in pasted text.

61Prefix & suffix linesAdd consistent text before or after every line.

62Lorem ipsum generatorGenerate placeholder paragraphs at a chosen length.

63ROT13Apply the reversible ROT13 letter substitution.

64Caesar cipherShift Latin letters forward or backward by a chosen amount.

65Morse code translatorTranslate Latin text to International Morse code and back.

Calculators

Solve common numeric, ratio, statistical, and conversion tasks locally.

66Percentage calculatorCalculate a percentage of any number.

67Percentage changeMeasure increase or decrease from an old value to a new one.

68Aspect ratio calculatorReduce dimensions and calculate a matching side.

69Average calculatorCalculate the arithmetic mean of a number list.

70Ratio calculatorReduce a two-part whole-number ratio.

71Fraction to decimalConvert a fraction into decimal and percentage form.

72Decimal to fractionApproximate a decimal as a reduced fraction.

73Scientific notation converterConvert numbers to and from scientific notation.

74Standard deviation calculatorCalculate population and sample standard deviation.

75Mean, median & modeSummarize a number list with central-tendency metrics.

76Random number generatorGenerate secure random integers within a range.

77Tip calculatorCalculate tip, total, and equal split per person.

78Discount calculatorCalculate savings and final price after a discount.

79Data size converterConvert bytes between decimal and binary storage units.

80Temperature converterConvert Celsius, Fahrenheit, and Kelvin values.

Date & time

Compare dates, calculate durations, and convert time values in your browser.

81Date differenceMeasure elapsed days, weeks, and calendar distance.

82Add days to dateMove a calendar date forward by a chosen number of days.

83Subtract days from dateMove a calendar date backward by a chosen number of days.

84Business days calculatorCount weekdays between two calendar dates.

85Day of year calculatorFind a date's ordinal day and remaining days in the year.

86ISO week number calculatorFind the ISO week-year and week number for a date.

87Time duration calculatorMeasure the duration between two clock times.

88Duration unit converterConvert a duration across milliseconds through weeks.

89Timezone converterView one instant in selected IANA timezones.

90Age calculatorCalculate full years, months, and days from a birth date.

Files & security

Inspect, package, split, and generate files or secure values without uploads.

91File checksumGenerate SHA-256, SHA-384, or SHA-512 for a local file.

92File type detectorInspect a file's declared type and common magic bytes.

93Zip filesBundle multiple local files into one ZIP archive.

94Unzip filesExtract a ZIP archive into a new local ZIP or file download.

95File to Base64Encode any file as Base64 text or a data URL.

96Base64 to fileDecode Base64 or a data URL into a downloadable file.

97Merge text filesJoin multiple local text files in selection order.

98Split text fileDivide a text file into numbered line-based chunks.

99Password generatorGenerate strong passwords with selected character groups.

100Secure random generatorGenerate random hexadecimal, Base64URL, or UUID-like values.

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