Your tools. Your device. Your data.

Drop any file and convert it to the format you need, with no upload.

Turn iPhone HEIC photos into JPGs that open everywhere.

Convert PNG images to smaller JPG files.

Convert WebP images to widely supported PNG.

Extract the audio of a video as an MP3 file.

Convert iPhone and QuickTime videos to MP4.

Drop any file to look inside it, with the right viewer picked for you.

Browse JSON as a collapsible tree and find syntax errors down to the line.

Check YAML for indentation and syntax errors and explore it as a tree.

Check that XML is well-formed and browse elements and attributes as a tree.

Validate TOML config files and see their structure as a tree.

Highlight, validate and format SQL for MySQL, PostgreSQL, SQLite and more.

Work out percentages, changes, increases and discounts in one place.

A full scientific calculator with history, functions and exact fractions.

Convert length, weight, temperature, volume, speed, data and more.

Calculate monthly payments, total interest and a full amortization schedule.

See how savings and investments grow with regular contributions.

Calculate BMI, body fat estimate and daily calorie needs.

Work out how much paint you need for walls and ceilings, and which cans to buy.

Count tiles, planks and boxes, with grout, adhesive and the right waste for your pattern.

Volume, bags and mix materials for slabs, footings, columns and steps.

Plan risers, treads, stringer length and headroom, with a side-view drawing.

Find the cable cross-section in mm² and AWG for a current, length and allowed voltage drop.

Decode and encode 4, 5 and 6 band resistors and SMD codes.

Check your camera: picture, resolution, frame rate and settings.

Check your mic level, hear yourself back and see a live spectrum.

Test left and right channels, bass, treble and surround speakers.

Press every key to find dead keys, ghosting and key rollover.

Test mouse buttons, double clicks, scroll wheel and polling rate.

Fill your screen with solid colors to spot dead or stuck pixels.

Convert a time between cities and time zones, with daylight saving handled.

Find a meeting time that works across several time zones.

Count down to any date, and share the countdown as a link.

Count days between dates, add or subtract time and count business days.

Calculate exact age in years, months and days, and the next birthday.

Convert Unix timestamps to dates and back, in seconds or milliseconds.

Encrypt files and text with a password using AES-256, right in your browser.

See how long a password would take to crack and how to make it stronger.

Calculate SHA-256, SHA-512, SHA-1, MD5, SHA-3, BLAKE3 and CRC32 checksums of files and compare them.

Remove hidden metadata from photos, PDFs and Office documents before sharing.

Hide a secret message inside an image, or reveal one.

Turn a note into an encrypted link that only people with the link can open.

Count words, characters, sentences and reading time as you type.

Convert text to UPPER, lower, Title, Sentence, camelCase, snake_case and more.

Compare two texts and see every added, removed and changed word.

Sort, dedupe, count, filter, shuffle, trim and number lines of text.

Find and replace text in bulk, with regular expressions and live highlights.

Turn text into bold, italic, script, bubble and other Unicode styles.

Measure your typing speed in WPM and your accuracy.

Test how fast you react to a visual signal, in milliseconds.

Count your clicks per second over 1 to 60 seconds.

Hit targets as fast and accurately as you can.

Train your memory with sequence, number and visual recall games.

Check how well you tell colors and shades apart.

Create bar, line, area, pie and scatter charts from your data.

Make grouped, stacked and horizontal bar graphs in seconds.

Plot trends over time as line or area graphs.

Create pie and donut charts with labels and percentages.

Plot two variables, add a trend line and see the correlation.

Build organization charts from a simple list of names and managers.

Plot functions, find roots and intersections, and explore with sliders.

Solve linear, quadratic, polynomial and systems of equations step by step.

Multiply, invert and find determinants, eigenvalues and more.

Mean, median, standard deviation, quartiles, regression and charts.

Add, subtract, multiply and divide fractions and mixed numbers.

An interactive periodic table with element details and trends.

Turn any boolean expression into a truth table, DNF, CNF, a simplified form and a Karnaugh map.

Practice multiplication and division facts with timed rounds and smart repetition of mistakes.

Sharpen mental arithmetic with sums, products, squares and percentages at your level.

Learn word lists by typing, multiple choice or flashcards, with forgiving answer checks.

Build multiple-choice, true/false and short-answer quizzes, play them and print them with an answer key.

Search math, physics and chemistry formulas and solve each one for any variable.

Turn a photo into a printable coloring page with clean outlines, or print a ready-made picture.

Make connect-the-dots puzzles from a picture or a built-in shape, with an answer sheet.

Print tracing sheets for letters, words, names and numbers in print or cursive.

Learn to tell the time on an analogue clock with levels, dragging hands and printable worksheets.

Create sticker, chore and behaviour charts to tick on screen or print.

Check text and UI colors against WCAG AA and AAA contrast rules.

See images and palettes as people with color vision deficiencies do.

Test every color pair in a palette for accessible contrast at once.

Paste HTML and find missing alt text, labels, heading and ARIA issues.

Tune font size, line height and line length for comfortable reading.

Measure the distance between places or coordinates, as the crow flies.

Convert coordinates between decimal degrees, DMS, UTM, MGRS and more.

Sunrise, sunset, golden hour and twilight for any place and date.

See the moon phase for any date and a monthly moon calendar.

Find the sun's height and direction and the shadow length at any time.

Use your phone as a compass with heading, bearing and your coordinates.

Build harmonious color schemes with contrast checks and CSS export.

Design linear, radial, conic and mesh gradients and copy the CSS.

Turn text, emoji or an image into a complete favicon set.

Tune layered box shadows with presets and a live preview.

Style text with neon, retro, glitch or 3D effects for logos and banners.

Create Open Graph, X and Instagram images in the right sizes.

Generate strong passwords and memorable passphrases.

Create QR codes for links, Wi-Fi and contacts with custom colors.

Get lorem ipsum and realistic test data as JSON, CSV or SQL.

Build regular expressions from simple rules and test them live.

Create EAN-13, UPC, Code 128, ITF-14 and more barcodes as SVG or PNG.

Generate UUIDs and NanoIDs or hash text with SHA-256 and more.

Encode text and files to Base64 or decode Base64 back, with URL-safe and data URI options.

Percent-encode or decode URLs and query strings, and edit every URL part in a table.

Escape text as named, decimal or hex HTML entities, or decode entities back to text.

Format, minify and validate JSON with exact error positions, sorted keys and string escaping.

Beautify or minify SQL, CSS, JavaScript, HTML and XML with your own indentation and style.

See each character's code point, name, bytes and escapes, and find invisible or look-alike characters.

Write title, description, Open Graph, Twitter and hreflang tags with pixel-based length checks.

See how your page looks in Google on desktop and mobile, truncated close to where Google cuts it.

Preview link cards for Facebook, X, LinkedIn, Slack, Discord, WhatsApp and iMessage before you share.

Build robots.txt with user-agent groups and presets, and test which rule allows or blocks a URL.

Turn a list of URLs into a valid sitemap.xml with lastmod, priority, images and hreflang.

Build campaign URLs with UTM parameters, channel presets and batch mode for many links at once.

Resize images by pixels, percentage or preset sizes, in bulk.

Shrink JPG, PNG and WebP files while keeping them sharp.

Convert JPG, PNG, WebP, AVIF and more to PNG, JPG, WebP, AVIF or ICO.

Crop to any aspect ratio, rotate and flip images.

Arrange photos into grid and mosaic collages.

Add a text or logo watermark to one or many images.

Make videos smaller while keeping good quality.

Convert videos between MP4, WebM, MOV and MKV, with or without sound.

Cut videos to the part you need.

Turn video clips into high-quality animated GIFs.

Save the soundtrack of a video as an audio file.

Save still frames and thumbnail sheets from videos.

Cut, trim and fade audio files on a zoomable waveform.

Make audio files smaller with the right bitrate, channels and format.

Even out loudness to LUFS or peak targets with a true-peak limiter.

Record your voice with a live level meter, then trim and save it as MP3, WAV and more.

Find and cut silent gaps in recordings, podcasts and voice memos.

Change tempo and pitch independently, from podcasts at 1.5× to nightcore.

Combine several PDF files into one document.

Extract pages or split a PDF into several files.

Reorder, rotate and delete PDF pages visually.

Convert PDF pages into PNG or JPG images.

Turn images into a single PDF document.

Reduce the file size of PDF documents.

Spin a wheel, roll dice, flip a coin or split people into teams.

Create printable crossword puzzles with answer keys.

Turn your word list into a printable word search puzzle.

Generate uniquely solvable sudokus in every difficulty level.

Generate mazes up to 80 × 80 cells and reveal the solution step by step.

Create custom printable bingo cards from numbers or words.

Roll d4 to d100 dice or RPG notation like 3d6+2, 4d6kh3 and advantage.

Flip one or many coins, play best-of series and track streaks.

Keep score for players or teams with rounds, a target score and a big TV view.

Build single or double elimination brackets and round robins, then click winners through.

Party-ready truth or dare questions for kids, friends and couples, with player turns.

Draw charades words or taboo cards with a timer, team scores and printable cards.

Turn any name into a unique identicon or pixel avatar.

Create flow fields, Voronoi patterns and circle packings from a seed.

Render big text banners or convert images into ASCII art.

Grow trees and ferns with L-systems and watch every step.

Draw symmetric mandalas or generate them as coloring pages.

Zoom into Mandelbrot and Julia sets with custom color maps.

Find names for fantasy characters, companies, pets and projects.

Generate islands with mountains, rivers and named cities.

Roll genre, hero, conflict and twist into a fresh story prompt.

Roll complete characters with class, stats and backstory.

Create procedural star systems with planets, moons and orbits.

Build roguelike dungeons with rooms, traps and treasure.

Add captions to your own images with classic meme layouts.

Generate absurd excuses, compliments and fortune cookie lines.

Design clearly labeled chat and post mockups for slides and comics.

Roll a band name, album title and a matching cover.

Generate chord progressions with bass and drums and play them instantly.

Create retro game sounds and export them as WAV.

Find chord diagrams for guitar and ukulele and build printable song sheets.

Turn the ingredients you have into dish ideas and meal plans.

Build workouts by time, equipment and muscle group.

Create HTML email signatures for Outlook and Gmail.

Fairly assign people to shifts while respecting their availability.

Fill in line items and get a finished invoice PDF.

Find cocktails you can mix with the bottles you have.

Print college, wide, narrow ruled or handwriting paper with margins and hole-punch marks.

Printable grid paper in mm or inches: square, isometric, hex, polar and log scales.

Bullet journal dot grid pages with your own dot size, spacing and color.

Blank sheet music with staves, grand staff, guitar tab and chord boxes.

Print address labels on Avery, Herma and Zweckform sheets, with calibration.

Design a business card with logo and QR code, then print up to 10 per sheet with crop marks.