Free online tools
57 free tools, with no sign-up and nothing to install. They run in your browser: your files never leave your device.
CONVERSION
Length Converter
Convert metric and imperial length units in seconds.
Use the Length Converter →DATES
Date Calculator
Calculate the exact number of days and weeks between two dates.
Use the Date Calculator →UNIX TIME
Unix Time Converter
Convert a timestamp to UTC or local time, and back again.
Use the Unix Time Converter →LEGAL PAGES
Legal Pages Generator
Create a starting point for seven documents: legal notice, terms, sales, privacy, cookies, shipping and refunds.
Use the Legal Pages Generator →CURRENCIES
Currency Converter
Convert an amount using the latest daily ECB reference rates. See the exchange rate used and its date.
Use the Currency Converter →COLOURS
Color Picker
Choose a colour, pick an exact pixel from an image and extract its dominant palette. Copy HEX, RGB and HSL values.
Use the Color Picker →QR CODE
QR Code Generator
Turn a URL or text into a QR code. Download a PNG image or an SVG vector file.
Use the QR Code Generator →PERCENTAGES
Percentage Calculator
Calculate a percentage of a value, a proportion, a percentage increase or a percentage decrease.
Use the Percentage Calculator →FAVICON
Favicon Generator
Create every useful favicon file from one image, entirely in your browser.
Create a favicon →WEB
Base64 and Data URI Converter
Convert an image to Base64 or a data URI, get the image back from Base64 code, turn an SVG into CSS and encode or decode text, right in your browser.
Convert →SOCIAL IMAGES
Social Image Resizer
Crop an image to the exact sizes required by Instagram, Facebook, LinkedIn, YouTube and other platforms.
Resize an image for social media →TIME ZONES
Time Zone Converter
Convert a date and time between two cities or time zones with daylight-saving changes handled correctly.
Convert a time zone →IMAGE AND PRINT
Image Size & DPI Calculator
Convert pixels, print dimensions, centimetres, inches and DPI.
Calculate image size and DPI →CINEMA
Film Length Calculator
Convert film length to running time and back, in Super 8, 8 mm, 16 mm, Super 16, 35 mm 2, 3 or 4-perf and 65 mm, with frames, timecode and number of rolls.
Calculate film length →CINEMA
Depth of Field Calculator
Depth of field, hyperfocal distance, field of view, close-up diopters and shutter angle: the cinematographer’s optical calculations, for film and digital.
Calculate depth of field →CINEMA
Video Storage Calculator
Work out the recording time of a drive or card, or the space you need, by resolution (HD, 4K, 6K, 8K), frame rate and codec (Apple ProRes, uncompressed, RAW).
Calculate storage →PALETTES
Color Palette Generator
Create harmonious palettes in one click, lock the colors you like, then share and export them as CSS, Tailwind or PNG.
Create a palette →ACCESSIBILITY
Color Contrast Checker
Check whether your text and background colors are readable and meet the WCAG AA and AAA accessibility levels.
Check contrast →TAILWIND CSS
Tailwind CSS Shade Generator
Generate the 11 Tailwind CSS shades (50 to 950) of any color and copy the code for Tailwind v4, v3 or CSS variables.
Generate shades →COLOURS
Tints and Shades Generator
From one colour, get its tints (towards white), shades (towards black) and tones (towards grey), plus a 50–950 scale, with code in HEX, RGB, HSL, CSS, SCSS, JSON or Tailwind.
Create shades →GRADIENTS
CSS Gradient Maker
Build a linear, radial or conic gradient, copy the CSS code and download it as a PNG image.
Create a gradient →GRADIENTS
Gradient Palette Generator
Get the in-between colors of two colors, from 3 to 20 steps, with natural perceptual blending.
Create a gradient palette →PALETTES
Image Color Palette Extractor
Extract the dominant colors of a photo, pick others with a click on the image, then copy or export the palette.
Extract a palette →IMAGES
Image Recolor Tool
Change the colors of an image while keeping its shadows and depth, then download the result as PNG, JPG or WebP.
Recolor an image →PHOTO
Online Photo Editor
Crop, rotate and retouch your photos: 14 adjustments, 22 filters and 11 effects (pixelate, halftone, VHS, painting…), then export as JPG, PNG or WebP.
Edit a photo →PHOTO
Photo Effects Studio
Distort, stylise and frame your photos: twirl, kaleidoscope, fire, liquid gel, CMYK halftone, god rays, fractal glass, tilt-shift, charcoal, pop art, bokeh, polaroid… then export as PNG, JPG or WebP.
Open the studio →IMAGES
ASCII Art Generator
Turn a photo or drawing into ASCII art: characters, blocks or braille, black and white or colour, then copy the text or export it as TXT, HTML or PNG.
Create ASCII art →PATTERNS
Seamless Pattern Generator
Create a pattern that repeats without seams: shapes, layout, colours, rotation, grain… then export the tile as PNG or SVG, the CSS code or a large image.
Create a pattern →PATTERNS
Tartan Generator
Design your tartan thread by thread: colour stripes, thread counts, symmetry and twill weave, then export a seamless tile or a large image.
Create a tartan →DESIGN
Background & Texture Generator
Create wallpapers and textures: mesh gradient, blurry gradient, blob, waves, starry sky, neon grid, confetti, grain, stripes, low poly, topographic lines… then export as PNG, JPG, WebP, SVG or CSS.
Create a background →CONVERSION
Image Converter
Convert your images to JPG, PNG or WebP in batches, adjust quality and size, and download them as a ZIP.
Convert images →IMAGES
Batch Image Resizer
Resize all your images at once by width, height, percentage or exact size, or compress them under a maximum weight (e.g. 200 KB), as JPG, WebP or PNG.
Resize →PALETTES
Color Palettes
More than 150 original color palettes sorted by theme: pastel, vintage, nature, ocean, neon, dark… Copy or edit them in one click.
Browse palettes →COLORS
Colors: names, codes and shades
Find colors by name or code: HEX, RGB, HSL, OKLCH, lighter and darker shades, complementary and matching colors.
Explore colors →GRADIENTS
CSS Color Gradients
Ready-to-use gradients, warm, cool, pastel, vivid or dark: copy the CSS code or open them in the gradient maker.
Browse gradients →Merge PDF Files
Combine several PDF files into one, in the order you choose. Your files stay on your device.
Merge PDFs →Split a PDF
Extract pages, separate every page or split a PDF by page ranges, right in your browser.
Split a PDF →Organize PDF Pages
Reorder, rotate and delete the pages of a PDF, or add the pages of another document.
Organize a PDF →Images to PDF
Turn your photos and images (JPG, PNG, WebP…) into a single PDF, in A4, Letter or image size.
Create a PDF →PDF to Images
Convert PDF pages into PNG or JPG images at the resolution you choose.
Convert to images →Compress a PDF
Reduce the size of a PDF so you can email it, without uploading the file to a server.
Compress a PDF →TEXT
OCR: Extract Text from an Image
Get the text out of a photo, a screenshot or a scanned document, in English, French, German or Spanish. Recognition runs in your browser: the image is never uploaded.
Extract text →FILES
Batch File Renamer
Rename dozens of files at once: template with number and date, find and replace, case, accents, extension… Instant preview, then a renamed ZIP or a script to rename in place.
Rename →TEXT
Word and Character Counter
Count words, characters, sentences and reading time, with SEO, social media and SMS limits.
Count words →TEXT
Braille Translator
Translate text to Braille and Braille to text, in English, French, German or Spanish, type Braille dot by dot and export an image of the dots.
Translate to Braille →TEXT
Morse Code Translator
Translate text to Morse code and Morse to text, listen at the speed you want, follow it as a light signal and download the sound as WAV.
Translate to Morse →SECURITY
Password Generator
Create strong passwords and passphrases, generated in your browser with cryptographic randomness.
Generate a password →VAT
VAT Calculator
Convert between net and gross amounts with the VAT rates of the UK and European countries, line by line if needed.
Calculate VAT →MARGIN
Margin and Markup Calculator
Work out selling price, markup, gross margin, price multiplier and food cost percentage.
Calculate a margin →REAL ESTATE
DPE and GES Label Generator (France)
Create the French energy (DPE) and climate (GES) labels from A to G for your listings, with values, estimated annual energy cost and the “excessive energy consumption” statement.
Create labels →REAL ESTATE
Real Estate Window Poster
Create a shop-window poster for a property for sale or rent: photos, price with fees, floor area, DPE and GES labels, required statements, as A4 or A3 PDF or as an image for social media.
Create a poster →REAL ESTATE
Carrez Law Floor Area Calculator (France)
Work out the Carrez-law private floor area of a French co-ownership unit, room by room: parts under 1.80 m deducted, cellars, garages and balconies excluded.
Calculate the area →REAL ESTATE
Estate Agency Fees Calculator
Go from the seller’s net price to the price including fees and back: fees as a percentage or flat amount, with or without VAT, paid by buyer or seller, with the price line for the ad.
Calculate fees →REAL ESTATE
Notary Fees Estimator (France)
Estimate the purchase costs of a property in France: land registration tax, property security contribution and notary fees, for existing or new-build homes.
Estimate costs →REAL ESTATE
Rental Yield Calculator
Calculate the gross and net yield of a rental investment: price, costs, works, rent, vacancy, charges, property tax and management.
Calculate yield →REAL ESTATE
Borrowing Capacity Calculator
Find out how much you can borrow from your income, current loans, duration, rate and insurance, with the French 35% debt-to-income rule.
Calculate capacity →RESTAURANTS
Allergen Table for Restaurants
Create a free table of the 14 allergens in your dishes: a printable PDF, a CSV export and a QR code your customers can scan on their phone.
Create the allergen table →No tool matches your search.
Simple tools made by KSPNAI
KSPNAI builds apps for restaurants and small businesses. These free tools handle small everyday tasks: documents, calculations, images, colors and text. New tools are added regularly.