Every task,
right here.

• Turn your trade name, representative, registration number and address into a nameplate image for business documents.

• Pick border, font and color; auto-trim and save as a transparent PNG.

• Make award, achievement, appreciation, appointment and completion certificates with the wording filled in.

• Add a seal or signature, then print to A4 or save as PDF or PNG.

• Drop a signature or stamp image onto a PDF and save it back as a PDF.

• Size it in millimetres, apply it to every page, and nothing ever leaves your browser.

• Draw your signature by mouse or finger, or turn your name into a handwriting-style signature.

• Auto-trim and save as a transparent PNG to drop into documents, contracts, and PDFs.

• Turn a name or initials into a round or square seal image.

• Pick layout, font, and color; auto-trim and save as a transparent PNG.

Copy special characters, emoji, and kaomoji with a single click. Arrows, stars, hearts, math symbols, and face emoji — all in one place.

• Count characters (with/without spaces), words, sentences, paragraphs in real time.

• Character types, UTF-8·EUC-KR bytes, and a limit checker.

• Drag over what you want hidden and it gets erased. Fill, mosaic, or blur.

• For ID and document scans. Runs in your browser with no upload.

• Crop a photo to passport, visa or resume size.

• Lays out a 4×6 inch print sheet for you.

Convert images between WebP, PNG, JPG and GIF. Batch convert, save each or download all as ZIP. Processed in your browser.

Convert iPhone photos (HEIC/HEIF) to JPG or PNG. Batch convert, save each or download all as ZIP. Processed in your browser.

• Crop any part of an image by ratio or exact pixel size.

• Runs in your browser with no upload. For profiles, icons, and thumbnails.

• Resize images by pixels or percent and shrink the file size.

• Runs in your browser with no upload. Shows how much smaller it got.

• Turn one image into favicon.ico plus a full PNG icon set.

• Rounded corners, padding, background, and the HTML snippet — all in one zip.

Generate dummy (lorem ipsum) text by paragraphs, sentences, or words. Latin and Korean, HTML tags, copy.

• Draws 6 numbers from 1–45, plus a bonus number.

• Fixed/excluded numbers and multiple games at once.

• Instantly create strong passwords with letters, numbers, and symbols.

• Copy or download; recent history stays on this device only.

• Create QR codes from a URL, text, WiFi, contact card, email, or PDF link.

• Customize colors, shapes, and a center logo; download as PNG, SVG, or JPG.

• Create barcodes in many formats: Code128, EAN-13, UPC, and more.

• Adjust bar width, height, and colors; download as PNG or SVG.

Pick random numbers by range, count, and uniqueness. For draws, lotteries, and sampling.

• Convert pyeong and square meters instantly, both ways.

• With a reference table of common Korean apartment sizes.

• Convert inches and centimeters instantly, both ways.

• With a reference table of common monitor and TV sizes.

• Convert °C and °F instantly, both ways.

• With a reference table of weather and oven temperatures.

• Convert kilograms and pounds instantly, both ways.

• With a reference table of gym plate and shipping weights.

• Pick a product code and watch VLOOKUP find the value step by step.

• Learn each argument (lookup value, range, column index, FALSE) by example.

• Pick a category and watch SUMIF add only the amounts that match the condition.

• Learn the criteria range, criteria and sum range by example.

• Watch MATCH find the position and INDEX return the value, step by step.

• Unlike VLOOKUP, it can return a column to the left of the search column.

• Paste a list or Excel table to remove duplicates or find only the duplicated items.

• Download the result as an Excel (xlsx) file.

• Compare two lists to find items that are only in one of them.

• Pick items missing from the reference or the common ones, export to Excel (xlsx).

Turn a buying plan into a table: entry price, quantity and running average for every tranche.

• Enter the P/E ratio and earnings growth to get the PEG ratio.

• PEG < 1 undervalued, 1–2 fair, > 2 overvalued — value adjusted for growth.

• Get the number of shares to buy from account size, risk %, entry, and stop-loss.

• A money-management tool that caps your loss per trade at a fixed share of the account.

• Get the risk/reward ratio (R:R) and break-even win rate from entry, stop-loss, and target.

• Check whether a setup offers enough reward for the risk.

• Get net profit from buy price, sell price, and quantity with fees and tax.

• See the final return (%) at a glance.

• Project your maturity value from initial deposit, monthly contribution, annual return, and term.

• See your assets grow with compounding on a graph.

• Get your new average price and total shares after buying more (averaging down).

• Enter the current price to see profit/loss and the % move to break even.

Convert Unix timestamps to dates and back. Batch convert many at once — every result stays in a list, with time zones, CSV export and code snippets.

• Enter a pattern and flags to highlight matches in real time.

• Inspect capture groups, preview replacements, and use common pattern presets.

• Turn text into MD5, SHA-1, SHA-256 and SHA-512 hashes at once.

• Uppercase toggle and copy; everything runs in your browser, nothing is uploaded.

• Encode or decode URLs with component and full-URL modes.

• Safely convert special characters and spaces, then copy the result.

• Encode or decode text as Base64, including the URL-safe variant.

• Handles Unicode as UTF-8 and lets you copy the result.

• Beautify JSON with indentation or minify it to a single line.

• Choose indent (2·4·tab), see error positions, and copy the result.

• Encode images to Base64 (Data URL) or decode Base64 back to an image.

• Runs in your browser — images are never uploaded to a server.

• Count down to a date (D-day), days between two dates, add/subtract days, and business days.

• See the day of the week instantly.