Free Online Tool Collection

Pick a category to open tools and printable templates. Many pages include a guide below the tool; the article index lists in-depth tutorials.

Text Tools

Paper templates, Markdown editor and other text-related online tools.

Paper TemplatesBrowse and download A4, A5, 16K paper templates

Markdown EditorOnline Markdown editor with local file support

Barcode Tools

Free online barcode and QR code generator. Export PNG, PDF.

BarcodeGenerate barcodes, CODE128, EAN13, UPC, Codabar, MSI and more

QR CodeGenerate QR codes, text, links, contacts and more

Data MatrixData Matrix 2D barcode for logistics, small items

PDF417PDF417 stacked barcode for IDs, boarding passes

Aztec CodeAztec code for transport tickets, boarding passes

WiFi QRWiFi QR code, scan to connect to network

vCard QRvCard QR, share contact info

Contact QRPhone, SMS, email, location QR codes

Color Tools

RGB color picker, HEX converter and more.

Format ConverterHEX/RGB/HSL/HSV/CMYK format conversion

Palette GeneratorComplementary, analogous, triadic palettes

Contrast CheckerWCAG contrast check, accessibility

Gradient GeneratorCSS linear/radial gradient generator

Image Color PickerUpload image, click to pick color

Color BlenderBlend two colors, adjust ratio

RGB ColorRGB color picker, adjust R, G, B values

HSL PickerHSL hue/saturation/lightness picker

Color NameFind closest CSS color name

Converters

Temperature, weight, length, number base conversion.

TemperatureCelsius, Fahrenheit, Kelvin

Lengthmeter, centimeter, foot, inch

Weightkg, gram, pound, ounce

Aream², hectare, mu

Volumeliter, milliliter, gallon

Timesecond, minute, hour, day

Speedm/s, km/h, mph

Angledegree, radian, grad

PressurePascal, psi, atm

Energyjoule, calorie, kWh

Data Storagebyte, KB, MB, GB, TB

Number BaseBinary, octal, decimal, hex

TimestampUnix timestamp & date

Roman NumeralArabic & Roman numerals

Chinese UppercaseArabic & Chinese uppercase (壹贰叁肆)

Scientific NotationScientific notation

Developer Tools

JSON format, JSON validate, JSON diff and other developer utilities. Data processed locally.

JSON FormatJSON format, beautify, minify

JSON ValidateJSON syntax validation, locate errors

JSON DiffCompare differences between two JSONs

File DiffCompare two text files or pasted text line by line

Base64 Encode/DecodeBase64 encode/decode

URL Encode/DecodeURL encode/decode

UUID GeneratorUUID v4 generator

Hash CalculatorSHA-256/384/512 hash

JWT DecoderJWT decode (no signature verification)

HTML EntityHTML entity encode/decode

Regex TesterRegex tester

Lorem IpsumLorem Ipsum placeholder

Case ConverterCase converter

Text StatsCharacter/word/line count

JSON ↔ YAMLJSON ↔ YAML converter

Image Tools

SVG to PNG/JPG, image to SVG, PNG/JPG/WebP format conversion.

SVG to PNGSVG to PNG

SVG to JPGSVG to JPG

Image to SVGImage to SVG vectorization

PNG to JPGPNG to JPG

JPG to PNGJPG to PNG

PNG to WebPPNG to WebP

WebP to PNGWebP to PNG

JPG to WebPJPG to WebP

WebP to JPGWebP to JPG

SVG to ICOSVG to ICO icon

PNG to ICOPNG to ICO

JPG to ICOJPG to ICO

WebP to ICOWebP to ICO

ICO to PNGICO to PNG

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