All Free Online Tools

Calculate exact age in years, months, days.

Upscale images 2x or 4x in your browser using an AI super-resolution model.

Calculate, simplify, and convert aspect ratios from width and height.

Trim audio files visually in the browser.

Convert audio files between MP3, WAV, M4A, and OGG in your browser, with bitrate and sample rate options.

Visualize audio files with real-time frequency bars.

Remove image backgrounds locally in your browser with an AI model.

Generate Code 128 and Code 39 barcodes.

Scan and decode barcodes and QR codes using your camera or an uploaded image.

Encode and decode Base64 strings instantly.

Generate bcrypt password hashes with an adjustable cost factor, and check whether a password matches an existing bcrypt hash.

Convert text to binary or hex and back, using UTF-8 encoding.

Calculate BMI with gender and age in metric or imperial units.

Minify or beautify JavaScript, CSS, and HTML in your browser with byte and gzip size stats.

Flip a virtual coin for random heads or tails.

Check WCAG contrast ratios between two colors.

Generate harmonious color schemes.

Pick colors and convert between HEX, RGB, HSL formats.

Calculate compound interest with different compounding frequencies.

Compress a JPEG or WebP image down to an exact target size in KB, like 20, 50, 100, or 200 KB, directly in your browser.

Online countdown timer with duration presets or count-down-until-time mode.

Compress multiple files into a downloadable ZIP archive.

Build cron expressions visually.

Create custom border radius values with visual controls.

Create CSS box shadows with a visual editor.

Create frosted glass effects with CSS.

Create beautiful CSS gradients with a visual editor.

Convert between CSS units - px, rem, em, pt, vw, vh, and more.

Detect the character encoding of a CSV file and convert it to UTF-8 with a byte order mark.

See row count, column count, detected delimiter, average row size, and estimated gzip size for any CSV.

Split a large CSV into smaller files by row count or byte size, preserve the header, and download a ZIP.

Compress CSV files to gzip in the browser.

Convert CSV files to JSON format.

Turn CSV into a GitHub Flavored Markdown table with column alignment and proper pipe escaping.

Convert a CSV file to Apache Parquet with inferred column types, locally in your browser.

Open a CSV file, view it as a paginated table, edit cells inline, and export the result.

Generate column-level statistics for any CSV, JSON, or Parquet file.

Generate a Markdown README for a CSV or JSON dataset, with schema, sample rows, and basic statistics.

Calculate the duration between two dates or add/subtract days, weeks, months, and years from a date.

Cant decide?

Roll virtual dice - D4, D6, D8, D10, D12, D20, D100.

Calculate distance between two GPS coordinates.

Simple whiteboard with colors, brush sizes, and eraser.

Build an HTML email signature for Gmail and Outlook from your name, title, and links, then copy it as rich text in one click.

Browse and copy emojis by category.

Convert electric car range between EPA, WLTP, NEDC, CLTC, and JC08 test cycles and see every equivalent at once.

Open .xlsx, .xls, and .ods files in your browser, browse every sheet, and export any sheet to CSV.

Extract and view EXIF metadata from photos.

Remove EXIF, GPS, and all metadata from a photo.

Convert text to fancy Unicode styles - bold, italic, script, and more.

Generate favicons in all sizes from a single image.

Encrypt and decrypt any file with a password using AES-256-GCM.

Calculate SHA-1, SHA-256, SHA-512 hashes for any file.

Find and replace text with case-sensitivity, whole-word matching, and full regex support.

Add, subtract, multiply, and divide fractions with automatic simplification, mixed-number output, and decimal equivalents.

Calculate the fuel cost of any trip from distance, fuel efficiency, and price per litre or gallon.

View GeoJSON, KML, KMZ, GPX, and Shapefile data on a map, inspect layers and details, and export to GeoJSON or KML.

Convert a GeoJSON FeatureCollection into KML that opens in Google Earth, Google My Maps, and most desktop GIS tools.

Compress animated GIFs in your browser by reducing colors, frame rate, and dimensions.

Calculate weighted GPA across courses on the 4.0, 4.3, or 4.33 scale.

Convert between Decimal Degrees and DMS format.

Convert GPS-exchange .gpx tracks, routes, and waypoints into a GeoJSON FeatureCollection ready for web maps.

Calculate your weighted course grade from scores and weights, or find the exact score you need on the final exam.

Decompress .csv.gz files in the browser.

Open .csv.gz files and browse the rows in a paginated table.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly.

Convert iPhone HEIC/HEIF photos to JPG or PNG locally.

Encode or decode HTML entities.

Search 50+ HTTP status codes with names, meanings, and category groupings.

Extract color palette from images.

Compress and reduce image file size without losing quality.

Crop images with preset aspect ratios or custom dimensions.

Apply Instagram-style filters to images.

Convert images between PNG, JPEG, WebP, and GIF formats.

Resize images to any dimension.

Rotate images 90°/180° and flip horizontally or vertically.

Convert any photo into ASCII art.

Convert images to Base64 encoded strings.

Combine multiple JPG or PNG images into a single PDF.

Extract text from images in your browser.

Create a professional A4 PDF invoice with line items, tax, discount, and multi-currency totals.

Compute network address, broadcast, mask, wildcard, and usable host range from any CIDR.

Format, validate, and beautify JSON data instantly.

Convert JSON arrays to CSV format.

Convert a JSON array of objects into a Parquet file with inferred column types, locally in your browser.

Paste JSON and get TypeScript interfaces instantly, with nested types, optional keys, union types, and a copy-ready result.

Convert JSON to YAML and YAML back to JSON with live output, selectable indentation, and parse errors that point to the failing line.

Visualize JSON data as an interactive tree.

Decode and inspect JSON Web Tokens (JWT).

Convert Google Earth KML placemarks, lines, and polygons into a standards-compliant GeoJSON FeatureCollection.

Click anywhere on a world map to read precise latitude and longitude.

Analyze text with detailed statistics.

Shuffle and randomize lists.

Count GPT-4o, GPT-4, GPT-3.5 and Claude tokens in your browser and estimate API cost before you send the prompt.

Calculate monthly loan payments with full amortization schedule.

Generate placeholder text for your designs.

Calculate daily protein, carb, and fat targets in grams from your TDEE, goal, and a macro split preset or custom ratio.

Write markdown with a formatting toolbar and see a live preview side by side.

Create memes with top and bottom text.

Analyze HTML meta tags for SEO.

Online metronome for musicians.

Convert military (24-hour) time to standard 12-hour AM/PM time and back, with a full 0000-2300 reference chart.

Generate fake names, emails, addresses, and other test data from a custom schema, exported as JSON, CSV, or SQL inserts.

Translate text to Morse code and back, with audio playback at a 600 Hz tone.

Calculate monthly mortgage payments with full amortization schedule.

Convert numbers between binary, octal, decimal, and hexadecimal in real time.

A distraction-free notepad that autosaves your text to the browser.

Generate Open Graph meta tags for social media sharing.

See file version, row counts, row groups, compression, and per-column encoded sizes in any Parquet file.

Open Apache Parquet files and browse their rows as a paginated table.

Show the column tree, physical types, logical types, and repetition of any Parquet file.

Convert a Parquet file to a downloadable CSV with proper quoting for commas, quotes, and newlines.

Convert a Parquet file to a downloadable JSON array, preserving nested structs, lists, and maps.

Crop photos to official passport and visa sizes, replace the background, and download print-ready files or a tiled 4x6 sheet.

Estimate net take-home pay from gross pay with tax rate, retirement contribution, and fixed deductions.

Shrink PDF file size in your browser.

Combine multiple PDF files into one.

Reorder, rotate, and delete pages in a PDF file, then export the rearranged document.

Add page numbers and an optional diagonal watermark to any PDF.

Add a password to a PDF with AES-256 encryption, or remove a known password, entirely in your browser.

Split a PDF into separate files by page range, chunk size, or single pages.

Convert PDF pages to PNG or JPG images in your browser.

Extract the text layer from a PDF in your browser.

Calculate percentages - X% of Y, percentage change, increase/decrease.

Blur, pixelate, or black out sensitive areas in photos.

Combine multiple photos into a grid collage.

Create pixel art on a grid canvas.

Create pixelated/mosaic effects.

Estimate your pregnancy due date from your last period or conception date, with cycle-length adjustment, current week, and trimester.

Create QR codes for URLs, text, WiFi, and more.

Scan QR codes from your camera or an uploaded image.

Run full SQL queries on CSV, JSON, and Parquet files in your browser using DuckDB-WASM.

Pick a random winner from a list of names or split them into balanced random teams.

Generate random numbers within any range.

Test and debug regular expressions in real-time.

Remove duplicate lines from a list with case-sensitivity, trim, and empty-line controls.

Generate a valid robots.txt file with user-agent groups, Allow, Disallow, Crawl-delay, and Sitemap entries.

Convert between Arabic numbers and Roman numerals instantly.

Convert annual salary to hourly rate (and back).

Calculate sales tax and totals from a pre-tax price, or back out the pre-tax price from a tax-included total.

Full scientific calculator with trig, logarithms, exponents, factorials, and memory keys.

Record your screen, window, or browser tab with optional microphone audio.

Add beautiful backgrounds, shadows, and browser frames to screenshots.

Generate strong, secure passwords instantly.

Add your signature to a PDF in the browser.

Draw and save digital signatures.

Create simple bar, line, and pie charts from data.

Count characters against platform limits for X, LinkedIn, Instagram, Threads, Facebook, Mastodon, and BlueSky.

Resize images for Instagram, Facebook, Twitter, LinkedIn, YouTube, and more.

Sort text lines alphabetically, numerically, by length, reverse them, or shuffle randomly.

Create a custom wheel with your own options and spin to pick randomly.

Format and beautify SQL queries.

Open SQLite database files, browse tables, and run SQL queries entirely in your browser.

Millisecond-precision online stopwatch with lap times and CSV export.

Convert subtitles between SRT and WebVTT, shift timing by decimal seconds, and renumber cues.

Edit SVG markup with syntax highlighting and see the rendered drawing update in a live preview pane.

Minify and optimize SVG files.

Generate a Tailwind-style 50 to 950 color ramp from any hex code.

Calculate your Total Daily Energy Expenditure and BMR using the Mifflin-St Jeor equation.

Convert text between UPPERCASE, lowercase, Title Case, camelCase, and more.

Compare two texts and see the differences highlighted.

Encrypt and decrypt text with a password using AES-256-GCM and PBKDF2.

Reverse text by characters, words, or lines.

Word count, readability scores, reading time, syllable estimate, and top word frequency.

Convert text to speech using browser voices.

Add or subtract hours, minutes, and seconds, or find the duration between two clock times, with decimal-hour output.

Add up weekly work hours from clock-in and clock-out times, subtract breaks, split regular and overtime, and estimate gross pay.

Compare time zones live, or convert a specific date and time in one zone to the matching moment in every other zone.

Calculate tips and split bills.

Convert between TOML, JSON, and YAML in your browser.

Add strikethrough, underline, overline, and zalgo/glitch effects to text using Unicode combining marks.

Convert between units - length, weight, temperature, time, data, and speed.

Convert Unix timestamps to human-readable dates and vice versa.

Open a ZIP archive in your browser, browse its contents, and download individual files or everything at once.

Analyze URLs and detect shortened links.

Encode or decode URLs and query strings.

Convert text to URL-friendly slugs.

Build properly encoded UTM tracking URLs for Google Analytics.

Generate random UUIDs (v4) instantly.

Compress MP4, MOV, and WebM videos in your browser using ffmpeg.wasm H.264 re-encode.

Convert MP4, WebM, and MOV video files in your browser using ffmpeg.wasm.

Strip the audio track from MP4, MOV, WebM, or MKV files in your browser using ffmpeg.wasm.

Extract the audio track from any video file and download it as MP3 or WAV, using ffmpeg.wasm.

Convert a video clip to an animated GIF in your browser using ffmpeg.wasm.

Cut and crop MP4, MOV, WebM, and MKV files locally with ffmpeg.wasm.

Add text watermarks to images.

Take photos with your webcam.

Remove extra spaces, tabs, and line breaks from text.

Count words, characters, sentences, and paragraphs in real-time.

Convert Word documents to PDF in your browser.

Format and beautify XML or minify it.

Format, indent, and validate YAML in your browser.