All tools

Encode text or files to Base58 and decode Base58 back to the original bytes, with the Bitcoin alphabet or a custom character set. Runs in your browser.

Encode text or files to Base64 and decode Base64 strings back to text or binary files. Accepts URL-safe Base64, missing padding and data: URLs.

Compress text or files to GZIP (.gz) with a compression level from 0 to 9, or decompress .gz files back to the original data, right in your browser.

Detect a text file's encoding, BOM and line endings, and convert it between UTF-8, UTF-16, Shift_JIS, EUC-JP and JIS. Also shows bytes and fixes mojibake.

Convert text to \uXXXX Unicode escape sequences, or turn \uXXXX and \u{1F600} escapes back into readable characters. Handles emoji and surrogate pairs.

Percent-encode text for URLs and query strings, or decode %XX sequences back to UTF-8 text. Choose whether reserved characters like / ? & = are encoded.

Convert CSV or TSV to JSON and JSON to CSV in your browser, with a table preview. Handles quoted fields, detects the delimiter and reads Shift_JIS files.

Convert JSON to YAML and YAML to JSON side by side in your browser. Set the indent size, array indentation and key sorting, then copy or download.

Format, validate and minify JSON in your browser. Paste or drop a file, pick 1–16 spaces or tabs, and get readable JSON without changing any number values.

Test JSONPath expressions against your own JSON and see the matches right away. Supports recursive descent ($..), wildcards, slices and filters.

View Parquet files online, convert Parquet to CSV or JSON and CSV to Parquet, run SQL on CSV files and profile every column, all in your browser with DuckDB.

Format or minify SQL in your browser for PostgreSQL, MySQL, SQL Server, BigQuery, Snowflake, SQLite, Oracle and 12 more dialects.

Open SQLite database files (.db, .sqlite, .sqlite3) online, browse tables and views, inspect the schema and run SQL queries, right in your browser.

Edit a table in a spreadsheet-style grid and get it as a Markdown (GFM) table, HTML, CSV, TSV, JSON or JSONL. Paste cells from Excel or Google Sheets.

Test XPath expressions on XML, HTML, XHTML or SVG in your browser. See every matching node, attribute or text, or the value of count() and string().

Convert YAML or JSON to XML and XML back to YAML or JSON in your browser. Attributes are kept as @_ keys and repeated tags become lists.

Open a ZIP file to list its contents, then add files or folders, create folders, rename or move entries, delete items and download the updated archive.

Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case and more, instantly in your browser.

Search about 1,900 emoji by name, short code, category or code point and copy any of them with one click. Shows Unicode names and short names.

Split emoji and text into visible characters (graphemes) and Unicode code points. See ZWJ parts, skin tones, variation selectors, flags and keycaps.

Convert Japanese hiragana to katakana and katakana to hiragana in one click. Kanji, romaji, punctuation and the long vowel mark ー are left untouched.

Test JavaScript regular expressions as you type and visualize each pattern as a railroad diagram, an NFA or a minimal DFA. Matches and groups are highlighted.

Compare two text files in your browser and see added, removed and changed lines highlighted in a split or unified view. Files are never uploaded.

Normalize text to Unicode NFC, NFD, NFKC or NFKD as you type. Convert full-width letters and half-width katakana, and unify accented characters.

Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512, CRC-32 and CRC-64 of text or a file at once. Results update as you type, and nothing leaves your browser.

Decode a JSON Web Token to read its header and payload, verify the signature with a secret, PEM key, certificate or JWKS, or create and sign a new JWT.

Generate strong random passwords (4 to 128 characters) with your browser's secure random generator, or check a password's strength and time to crack.

Generate RSA, ECDSA, ECDH and Ed25519 key pairs in your browser and export them as PEM (PKCS#8 / SPKI) or JWK. Set key length, exponent, hash or curve.

Generate random 128-bit or 256-bit keys for HMAC, AES-GCM, AES-CBC, AES-CTR and AES-KW, and export them as JWK, Base64 or a raw binary file.

Generate 6-digit TOTP codes from a Base32 secret, or scan a 2FA setup code with your camera or a screenshot, like an authenticator app in the browser.

Generate pairwise (all-pairs) and n-wise test cases in your browser. Enter factors and values in a grid and exclude combinations with PICT constraints.

Create a QR code from any text or URL. Set the size, colors and error correction level, add a logo in the center, and download it as a PNG image.

Generate ULIDs: 26-character IDs made of a millisecond timestamp and 80 random bits in Crockford Base32. Create up to 10,000 at once, in increasing order.

Generate up to 10,000 time-based UUID v1 values at once from the current timestamp, a clock sequence and a random node ID. Copy them or download a .txt file.

Create a name-based UUID v3 by hashing a namespace and a name with MD5. Pick the DNS, URL, OID or X.500 namespace or paste your own; same input, same UUID.

Generate random UUID v4 values (GUIDs) in bulk, up to 10,000 at once, using your browser's cryptographically secure random generator. Copy or download as text.

Turn a name into a stable UUID v5 by hashing it with a namespace using SHA-1. Use the DNS, URL, OID or X.500 namespace or your own; same name, same ID.

Generate time-ordered UUID v7 values, up to 10,000 at once. Each starts with a Unix timestamp in milliseconds, so they sort by creation time as database keys.

Record video from your webcam or phone camera and take still photos in your browser. Recordings download as WebM or MP4 files and photos as PNG.

Make an animated GIF from a set of images or a clip of a video. Set the delay of each frame, the width, colors and loop count, then download it.

Play an animated GIF frame by frame: pause anywhere, step forward or back, seek with a slider, change the speed, and save any frame as a PNG image.

Reduce the file size of JPEG, PNG and WebP images in your browser by lowering the quality or the dimensions, and compare before and after with a slider.

Convert images to PNG, JPEG, WebP or AVIF in your browser. Convert many files at once, set the quality, resize, and download them one by one or as a ZIP.

Crop, rotate, flip and resize images, adjust brightness and contrast, apply filters, and add text, shapes or a watermark, all in your browser.

Combine JPG, PNG and other images into one PDF, one image per page. Reorder the pages and choose the paper size, orientation, margin and fit.

View the EXIF metadata of a JPEG photo, including the camera model, exposure settings, date taken and GPS location, and save a copy with EXIF removed.

Turn Markdown or plain text into a PDF with your browser's print dialog. Preview it on paper and set the paper size, orientation, margin and font.

Scan QR codes and barcodes with your camera or read them from an image file. Copy the decoded text, or open a scanned link in a new tab with one click.

Play a video or audio file from your device in the browser with standard controls. The last file and playback position are remembered for next time.

Pick a color and get its HEX, RGB, HSL, HSV and CMYK values, or type a value in any format to convert it. The nearest named color is shown too.

Check the contrast ratio between a text color and a background color against WCAG 2.x AA and AAA, with a live preview and suggested colors that pass.

Generate favicon.ico, PNG favicons, an apple-touch-icon, Android Chrome icons and site.webmanifest from one image, plus the HTML tags to paste.

Show the current time and date in any time zone on an analog clock face and a digital display, in 12-hour (AM/PM) or 24-hour format. Updates every second.

Paste a cron expression to get a plain-English or Japanese description, a field-by-field breakdown and the next 5 to 50 run times in any time zone.

Convert Western dates to Japanese era dates (wareki) such as Reiwa, Heisei and Showa, and back. Covers every era since Taika (645) and shows the eto and weekday.

Online stopwatch with Start, Stop, Reset and LAP buttons. Shows time to 1/100 second with a table of lap and total times, and keeps running if you reload.

Calculate the time between two dates and times, each in its own time zone. See the difference in years, months, days, hours, minutes, seconds and milliseconds.

Convert Unix timestamps in seconds, milliseconds or microseconds to a readable date and back, in any time zone. Pick a date, choose a format, or jump to now.

See what percentage of the current year has passed, with a progress bar and the number of days and weeks gone by. Uses your local time, updated every minute.

Find the zodiac sign for any birthday and see all 12 Western zodiac signs with symbols and date ranges, from Aries (03/21-04/19) to Pisces. Click to copy a symbol.

Convert area between square meters, square feet, acres, hectares, square miles and more. Enter a value in any unit and all the others update instantly.

Convert integers between binary, octal, decimal and hexadecimal, plus Base26, Base36 and Base62. Type in any base and all the others update instantly.

Convert data sizes between bits, bytes, KB, MB, GB, TB and up to YB, including binary units (KiB, MiB, GiB, TiB) and bit units (kbit, Mbit, Gbit).

Validate or calculate check digits with Luhn (mod 10), Verhoeff, Damm, ISBN-10, ISBN-13, EAN-13 (JAN), UPC-A, Modulus 10 and Modulus 11 (weights 2-7).

Convert energy between joules, calories, kilocalories, watt-hours, kWh, BTU, foot-pounds and electronvolts, from nutrition labels to electricity bills.

Convert length and distance between meters, centimeters, inches, feet, yards, miles, nautical miles, light-years and more, all updating as you type.

Convert a duration between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, decades, centuries and millennia.

Convert speed between km/h, mph, m/s, knots, feet per second, Mach and the speed of light. Type a speed in any unit and see all equivalents at once.

Convert volume between liters, milliliters, cubic meters, US and UK gallons, quarts, pints, fluid ounces, tablespoons, teaspoons and barrels in one list.

Convert weight and mass between kilograms, grams, pounds, ounces, stones, carats, grains and US, UK and metric tons. Edit any unit and the rest follow.

Download an HLS stream from its .m3u8 URL and save it as a single .ts or .mp4 file. Choose a quality from a master playlist and fetch segments in parallel.

Calculate the network address, broadcast address, subnet mask, wildcard mask, usable host range and host count for any IPv4 or IPv6 CIDR or IP/mask.

Run ping, traceroute and MTR against any host from probes all over the world, and compare latency, packet loss and the network path by location.

A click counter for tallying people, laps, items or votes: click the number to add 1, or press Edit to type any value. The count is saved in your browser.

Open, edit and run Jupyter notebooks (.ipynb) in your browser, or start a new notebook and use it as an online Python environment. No installation or account needed.

Write Markdown with a live side-by-side preview. Toolbar buttons for headings, lists, tables, code, Mermaid diagrams and math; save as a .md file.

Sketch diagrams, flowcharts and notes on an infinite canvas with shapes, arrows, freehand drawing, text and images, built on the open-source Excalidraw.