Image editing

• Aspect Ratio Calculator Lock an aspect ratio and solve width ↔ height in pixels
• Brightness & Contrast Adjust brightness, exposure, contrast and saturation — no upload
• Rotate & Flip Rotate, flip and straighten an image — no upload
• Black & White / Sepia Convert an image to black & white or sepia — no upload
• Duotone Recolour an image into two tones — no upload
• Halftone Turn an image into comic-style halftone dots — no upload
• Dither Dither an image to a retro 1-bit look — no upload
• Film Grain Add analogue film grain to a photo — no upload
• Glitch Art Add a glitch / datamosh effect to a photo — no upload
• ASCII Art Turn an image into ASCII text art — copy or PNG, no upload
• Pixel Art Turn an image into pixel / dot art — shrink + reduce colours, no upload
• Colour Blindness Simulator See how an image looks with colour blindness — protan / deutan / tritan, no upload
• Meme Generator Add top / bottom text to an image — classic Impact-style caption, no upload
• Speech Bubble Add a manga / comic speech bubble to an image — drag to place, no upload
• Sprite Sheet Maker Pack frames into one sprite sheet — columns, frame size, transparent, no upload
• GIF Maker Turn a set of images into an animated GIF — frame delay, loop, transparent, no upload
• Video to GIF Trim part of a video and turn it into an animated GIF — fps, loop, no upload
• Video Frames Extract still frames from a video at a fixed interval — save as PNG/JPEG or ZIP, no upload
• Mosaic Pixelate, blur or black out parts of an image
• Resize Resize images by pixels or percentage
• Crop Crop an image down to any selection
• Convert Convert between PNG, JPG and WebP
• Compress Shrink image file size with a quality slider
• Watermark Add a text watermark to an image
• Tiled Watermark Tile a text watermark across the whole image — angle, spacing, hard to crop out, no upload
• LINE Sticker Maker Resize an image to LINE / Discord sticker sizes — transparent PNG, no upload
• Text Emoji Maker Turn short text into a square transparent emoji for Slack / Discord — stretched to fill, no upload
• Image Grid Combine images into a contact-sheet grid — no upload
• Image Merge Combine photos into one — side by side, stacked, or big + 2
• Collage Maker Make a photo collage — grid layout, rounded corners, social sizes
• Measurement Chart Maker Draw a flat-lay garment measurement chart for resale listings — labelled lines, no upload
• Square Crop & Compress Crop a photo to a perfect square and compress it for resale listings — no upload
• Placeholder Image Generator Generate a dummy placeholder image at any size with custom colors and label — no upload
• Identicon & Initials Avatar Generator Generate a deterministic identicon or initials avatar from any name or string — no upload
• Noise & Background Texture Generator Generate a noise, paper, grid or dots background texture at any size — transparent PNG, no upload
• Gradient Background Image Generator Generate a linear or radial gradient background image at any size and color — PNG/JPEG, no upload
• OG Image Maker Make Open Graph / social thumbnails — sized, with text & background
• Screenshot Frame Add padding, background, rounded corners & shadow to a screenshot
• Alpha Check Check PNG transparency on a checkerboard — no upload
• Tile Preview Check if a texture tiles seamlessly — no upload
• Color Palette Extract a color palette from an image — HEX / RGB, no upload
• Social Media Crop Crop to exact X / YouTube / Instagram icon, header & thumbnail sizes — no upload
• Round Crop Crop a photo into a circular avatar — transparent PNG, no upload
• Add Border Add a white / black border or Polaroid frame to a photo — no upload
• Image Splitter Split an image into an N×M grid of tiles (Instagram grid) — ZIP, no upload
• Favicon Generator Make a favicon.ico + all PNG sizes from an image — ZIP, no upload
• Pixel Art Upscaler Upscale pixel art with nearest-neighbor — crisp, no blur, no upload
• SVG to PNG Rasterize an SVG to a PNG at any pixel size — no upload
• GIF Frame Extractor Split an animated GIF into PNG frames — download as a ZIP, no upload
• Color Picker Pick HEX / RGB / HSL colors from an image with a magnifier — no upload
• DPI Changer Set a PNG/JPEG's print DPI losslessly — no resampling, no upload
• Transparent Background Make a color transparent → transparent PNG (white / green screen) — no upload
• Images to PDF Combine images into one PDF — reorder, A4 / fit, margins
• PDF to Image Export each PDF page as a PNG or JPG image — no upload
• PDF Merge & Split Combine PDFs, reorder / delete pages, or split each page — no upload
• Photo Print Layout Tile photos at real print sizes onto A4 / L-size for home printing — no upload

AI · Stable Diffusion

• PNG Info View AI prompt & generation data in an image
• Batch PNG Info Extract AI generation data from many images to one CSV
• Safetensors Info Read a LoRA's trigger words & base model (header only)
• LoRA Metadata Editor Edit a safetensors LoRA's trigger words & notes, then re-save — weights untouched
• Embedding Viewer Read a Textual Inversion's trigger word, vectors & base model
• Tag Formatter Tidy booru tags: underscores, escaping, dedupe & sort
• Tag Translator Translate booru tags between English & Japanese — built-in dictionary
• Prompt Translator Turn a Japanese prompt into English tags — built-in phrase dictionary
• CLIP Token Counter Count CLIP tokens & see the 75-token chunk breaks — no upload
• Prompt Weight Convert prompt weights: A1111 ⇄ NovelAI ⇄ (word:1.2)
• Negative Prompt Generator Build negative + quality tags: SDXL / Pony / NovelAI presets
• Danbooru Search Query Builder Build booru search syntax: tags, rating, order, ratio, score
• Prompt Organizer Sort & reorder prompt tags by category: quality, subject, style…
• Video Prompt Builder Build text-to-video prompts: camera, shot, lighting, style, length
• Seed Generator Generate random SD seeds & seed sequences for batch / XYZ plot
• VRAM Calculator Estimate Stable Diffusion VRAM from model / resolution / batch / precision
• Checkpoint Merge Calculator Merge ratios + Merge Block Weighted (MBW) weight strings for SD checkpoints
• Canny Edge Detector ControlNet canny edge map preview — tune thresholds, no upload
• Line Art Extractor Turn a photo into black-on-white line art — pencil-sketch style, no upload
• Image Diff Compare two images pixel by pixel — heatmap, highlight & raw diff, no upload
• Comparison Slider Wipe between two images with a draggable divider — before/after PNG, no upload
• SD Resolution Aspect ratio → SDXL / SD width × height (multiple of 64)
• ComfyUI Workflow Extract the workflow JSON from a ComfyUI PNG — no upload
• Model Hash Civitai AutoV2 / SHA256 of a model — in-browser, no upload
• Prompt Matrix Expand {a|b|c} prompt templates into every combination
• Prompt Diff Compare two prompts tag-by-tag: added, removed & common
• Tag Counter Count tag frequency across caption .txt files — no upload
• Caption Editor Batch-edit caption .txt files and re-save as a zip — no upload
• Bucket Preview See which kohya / SD training bucket each image lands in — no upload
• Dataset Dedupe Find near-duplicate images in a training set via perceptual hash — no upload
• Wildcard Tester Preview __wildcard__ & {a|b|c} dynamic prompts with random samples — no upload
• Wildcard File Maker Build __wildcard__ .txt files for sd-dynamic-prompts as a ZIP — no upload
• PNG Metadata Add Write a prompt or comment into a PNG's tEXt — lossless, no upload
• Hires Fix Calculator Base size × upscale factor → final resolution (and back) — no upload
• LoRA Prompt Builder Stack multiple <lora:name:weight> tags + trigger words into one prompt — no upload
• Image Colors to Prompt Turn an image's dominant colors into English color words for prompts — no upload
• Prompt Schedule Visualizer Visualize [from:to:step] and [a|b] prompt editing on an Automatic1111 step timeline
• X/Y/Z Plot Values Generate Steps/CFG/Seed/Sampler axis value lists for the X/Y/Z plot script

Privacy

• Remove EXIF Check & strip GPS location from photos — no upload
• EXIF Viewer View every EXIF metadata & GPS tag in a photo (read-only) — no upload
• Batch EXIF Strip Strip EXIF/GPS from many photos at once → ZIP, no upload
• PDF Metadata Remover View & remove a PDF's author / title / metadata — no upload
• Office Metadata Remover View & remove author / company metadata from Word / Excel / PowerPoint — no upload
• PDF Redaction Black out a PDF permanently — boxes are burned in, text underneath is gone (no upload)
• Password Strength Checker Check a password's strength, entropy & estimated crack time in your browser — nothing uploaded
• Redact Image Black out / blur sensitive areas of documents & screenshots
• Clean Metadata Remove AI prompt & EXIF before posting (lossless)

Developer

• JSON Formatter Format, validate & minify JSON — no upload
• Regex Tester Test regex with live match highlight, groups & replace — no upload
• QR Code Generate a QR code from text or a URL — PNG & SVG, no upload
• CSV to Markdown Convert CSV / TSV into a Markdown table — no upload
• Markdown ⇄ HTML Convert Markdown to HTML (with a table of contents) and back — no upload
• Base Converter Convert binary, octal, decimal & hex — with a bit view, no upload
• JWT Decoder Decode a JWT's header & payload in your browser — no upload, not verified
• JWT Generator Sign a JWT (HS256/384/512) from your payload & secret — no upload
• Hash Generator Generate MD5, SHA-1, SHA-256 & SHA-512 hashes of text in your browser
• UUID Generator Generate UUID v4 / v7 in bulk in your browser — no upload
• Unix Timestamp Converter Convert Unix epoch (sec/ms) ⇄ date with UTC, local & relative time
• Cron Expression Parser Explain a cron expression in plain words and show the next run times
• Color Code Converter Convert a color between HEX, RGB, HSL & HSV at once, with alpha & copy
• Color Contrast Checker Check text/background contrast ratio against WCAG AA & AAA, with preview
• Text Diff Checker Compare two texts by line, word, or character — additions and deletions color-coded
• JSON Diff Compare two JSON documents by structure — no upload
• JSONPath Tester Extract values from JSON with JSONPath — no upload
• CSV Viewer View CSV as a sortable, filterable table — no upload
• Excel to CSV Convert an .xlsx workbook to CSV in your browser — no upload
• CSV Encoding Converter Fix a garbled CSV — convert between UTF-8, BOM & Shift_JIS — no upload
• CSV Merge Merge multiple CSV files into one in your browser — no upload
• Encoding Converter Convert a text file between UTF-8, Shift_JIS & EUC-JP — no upload
• Mojibake Fixer Paste garbled text and restore it to readable UTF-8 — no upload
• ZIP Maker & Extractor Make and unzip ZIP files in your browser — no upload, no install
• PDF Stamp / Hanko Place an electronic seal or stamp on a PDF in your browser — no upload
• Add Page Numbers to PDF Add page numbers to a PDF in your browser — formats, position, start page, no upload
• PDF Watermark Stamp a watermark like "CONFIDENTIAL" across a PDF in your browser — no upload
• PDF Extract Text Extract text from a PDF in your browser — keep line breaks, copy or save .txt, no upload
• Gantt Chart Maker Type tasks (name, start, end) and get a Gantt chart you can save as PNG — no upload
• Case Converter Convert text between camelCase, snake_case, kebab-case, PascalCase and more
• Morse Code Translator Translate text ⇄ Morse code (international & Japanese Wabun) with audio playback
• Unicode Inspector Inspect each character's code point, UTF-8, HTML entity & JS escape — and spot invisible characters
• Meta Tag Generator Generate SEO, Open Graph & Twitter Card meta tags with a live preview — no upload
• CSS Gradient Generator Build linear, radial & conic CSS gradients with a live preview — no upload
• Color Palette Generator Generate complementary, analogous, triadic & monochrome color schemes from one color — no upload
• cubic-bezier Generator Drag control points to build a CSS cubic-bezier easing curve with live preview — no upload
• CSS box-shadow Generator Build a CSS box-shadow (offset, blur, spread, color & inset) with a live preview — no upload
• WiFi QR Code Generator Turn your WiFi SSID & password into a connect-on-scan QR code — PNG/SVG, no upload
• vCard QR Code Generator Turn contact details into a scannable vCard QR code (and .vcf) — PNG/SVG, no upload
• Sort Text Lines Sort, deduplicate, shuffle, or trim lines of text — alphabetical, numeric, or by length
• Lorem Ipsum Generator Generate Lorem Ipsum or Japanese dummy text by paragraphs, sentences, or words
• JSON ⇄ CSV Converter Convert a JSON array of objects to CSV and CSV back to JSON, in your browser
• YAML ⇄ JSON Converter Convert YAML to JSON and JSON back to YAML in your browser — config files never leave your device
• QR Code Reader Read the text or URL inside a QR code from an image — no upload
• URL Encoder / Decoder Percent-encode or decode text and URLs, and split a query string into key/value pairs
• Address Book Dedupe & Cleanup Tidy & deduplicate an address book or name list — full-width → half-width, no upload
• Roman Numeral Converter Convert Roman numerals to numbers and back (I/V/X/L/C/D/M) — no upload
• Unit Converter Convert length, weight, temperature, area, speed & data units — no upload
• Password Generator Generate strong random passwords & passphrases in your browser — crypto-secure, no upload
• Image ⇄ Base64 Convert an image to a Base64 data URI and back, in your browser — no upload
• Barcode Generator Generate EAN-13/JAN, EAN-8, UPC-A & Code 128 barcodes — PNG & SVG, no upload

Writing & academic

• Citation Formatter Format references in APA, MLA & SIST 02 — no upload
• GPA Calculator Calculate GPA from grades & credits — multiple scales, no upload
• Character Counter Count characters, words, lines & manuscript sheets — no upload
• Furigana Add furigana (ruby readings) to Japanese kanji text — no upload
• Hyoki-yure Checker Find & unify inconsistent Japanese spellings (okurigana, kana, katakana) — no upload
• Genko Preview Flow text into 400-square Japanese manuscript paper & save as PNG — no upload
• Kana Converter Hiragana ⇄ katakana, half-width ⇄ full-width — 5 conversions at once, no upload
• Rōmaji Converter Kana ⇄ rōmaji (Hepburn & Kunrei) — both spellings at once, no upload
• LaTeX Equation Preview Render LaTeX math with KaTeX and save it as a PNG image — no upload
• Function Graph Plotter Plot y=f(x) (multiple functions) and save the graph as a PNG — no upload
• Truth Table Generator Build a truth table from any logic expression — classify & compare, no upload
• Find & Replace Text Bulk find & replace across text, with regex, case & whole-word options — no upload
• Remove Line Breaks Strip or normalize line breaks — unwrap PDF text, join into one line — no upload
• Word Frequency Counter Count how often each word, phrase (n-gram) or character appears — CSV export, no upload
• Japanese Readability Checker Measure sentence length, kanji ratio & the kana mix; flag sentences that run long — no upload
• Character Name Generator Generate fantasy, elf, sci-fi & Japanese character names in one click — no upload
• Kaomoji Picker Browse Japanese emoticons by mood and copy any one with a click — no upload
• Special Characters Picker Browse arrows, math, currency, brackets & more by category and copy with a click — no upload
• Markdown Table Generator Edit a table in a grid and get clean Markdown — paste from Excel / CSV to convert, set column alignment, copy. No upload
• Fancy Text Generator Turn your text into 20+ Unicode styles — bold, italic, script, fraktur, circled, upside-down — and copy with a click. No upload

Daily life · Japan

• ID Photo Passport / visa / resume photo + print sheet — no upload
• Resale Profit Marketplace profit: fees, shipping, margin & break-even
• Hanko Maker Japanese name seal → transparent PNG, no upload
• Wareki Japanese era ⇄ year, age & business-day calculator
• Recipe Scaler Rescale recipe ingredients by servings — no upload
• Cooking Units Cups ⇄ ml ⇄ grams by ingredient density — no upload
• Japanese Gift-Money Guide Customary goshugi, koden & otoshidama amounts by relationship and age — no upload
• Age Calculator (Full Age & Kazoedoshi) Calculate exact age from a date of birth — full years, kazoedoshi, days lived & next birthday. No upload
• Date Difference & Add/Subtract Days Days between two dates (weeks, Y/M/D, business days) and the date N days/weeks/months/years before or after. No upload
• Business Days Calculator Add/subtract business days or count working days between dates, excluding weekends and Japanese holidays. No upload
• Japanese Public Holidays List the public holidays of any year (2000–2099) or check if a date is a holiday — substitute holidays included, all in your browser. No upload
• Time Calculator Add and subtract times (h:mm) and total work hours from start, end and break — in your browser. No upload
• Monthly Calendar Maker Make a printable monthly calendar for any year/month with Japanese holidays — save as PNG or print. No upload
• Envelope Address Print (Naga 3 / Kaku 2) Print recipient and sender addresses on a Naga-3 or Kaku-2 envelope, vertical or horizontal — save as PNG or print at actual size. No upload
• Business Card Maker (A4 imposition) Make business cards and lay them out 10-up on A4 to print at actual size — save as PNG. No upload
• Fuel Cost & Fuel Economy Calculator Fuel cost from distance, economy and price/L — with liters, per-person split and cost/km. Also real km/L from liters. No upload
• Electricity Cost Calculator Appliance running cost from power (W), hours and price (¥/kWh) — daily, monthly, yearly plus CO₂. Also cost from kWh. No upload
• Random Picker (Name Draw) Paste names or items, one per line, and randomly pick winners — choose how many, allow repeats, spin-style animation. No upload
• Random Team / Group Generator Paste names, one per line, and randomly split them into teams or groups — by team count or members per team, sizes nearly even. No upload
• Amidakuji Maker (Ladder Lottery) Enter participants and results to generate a random amidakuji (ghost-leg) ladder — tap a name to trace its path. No upload
• Bingo Card Generator Make printable bingo cards in bulk — classic numbers or your own word list. Pick the FREE space and grid size, then print. No upload
• Rokuyo Calendar (Taian / Butsumetsu) Monthly calendar of the six Japanese rokuyo days (Taian, Butsumetsu, etc.) with the lunar date, computed in your browser. No upload
• Zodiac & Birthstone Finder Find Chinese zodiac, star sign, birthstone & birth flower from a birth date — no upload
• Nengajo Layout Lay out a New Year / mourning postcard (hagaki) for print — no upload
• Number to Kanji Convert numbers to kanji / daiji (formal) — for gift envelopes & receipts
• Shipping Compare Find the cheapest flat-rate way to ship a parcel by size & weight (JP)
• Warikan (Bill Split) Split a bill with rounding, tiered shares, and an organizer who absorbs the remainder
• Tip Calculator & Splitter Work out the tip and total from the bill and a tip %, then split it between any number of people — quick 10/15/18/20% presets, round-up option. No upload
• Consumption Tax Calculator Add or strip Japanese consumption tax — tax-included/excluded, 8% & 10%
• Japanese Units Converter Convert Japanese traditional units (shakkanho) and metric — tsubo, shaku, go, monme
• Time Zone Converter & World Clock See many cities' current time at once, with the difference from a base city
• Baggage Size Checker Check if a bag fits airline carry-on & checked baggage rules by size and weight
• Paper Size Chart A & B paper sizes in mm, cm, inch and pixels at any DPI — plus an mm⇄px converter
• Clothing Size Converter Convert clothing sizes between S/M/L, Japan, US, UK, EU & cm — no upload
• Shoe Size Converter Convert shoe sizes between Japan (cm), US, UK, EU & foot length — no upload
• Ring Size Converter Convert ring sizes between Japan (go), US, UK, EU & inner diameter (mm) — no upload
• Moon Age & Baby Age Moon age, phase & illumination for any date — plus a baby's age in months
• Pet Age in Human Years Convert a dog or cat's age to human years (by size) with life stage
• Vertical Text to Image Typeset Japanese vertical text (tategaki) and export it as a transparent PNG — no upload