The index138 tools
Every tool, one page.
All 138 Quill Tools instruments across 9 product lines — formatters, converters, compressors, generators and analysers. Every one runs entirely in your browser: nothing uploads, nothing is stored, and there is no account to create.
FreeNo sign-upRuns in your browser
28 tools
Category hub Developer Tools
Essential utilities for developers format, encode, decode, and minify code.
01JSON FormatterFormat, beautify, and validate JSON data online for free. Instantly prettify minified JSON with syntax highlighting and error detection. No signup required.02Base64 Encoder / DecoderEncode text and files to Base64 or decode Base64 strings online for free. Essential tool for APIs, data URIs, and embedded content. No signup required.03URL Encoder / DecoderEncode and decode URLs and query parameters online for free. Handle special characters, Unicode, and percent-encoding instantly. No signup required.04UUID GeneratorGenerate random UUID v4 identifiers online for free. Create single or bulk UUIDs for databases, APIs, and application development. No signup required.05JWT DecoderDecode and inspect JWT tokens online for free. View header, payload, and signature claims with expiration validation. No signup required.06Regex TesterTest and debug regular expressions online for free with real-time matching and group extraction. Supports JavaScript regex syntax. No signup required.07HTML MinifierMinify HTML code online for free. Remove whitespace, comments, and unnecessary attributes to reduce file size and improve page load speed. No signup required.08CSS MinifierMinify CSS stylesheets online for free. Remove whitespace, comments, and redundant rules to optimize your CSS for production. No signup required.09JavaScript MinifierMinify JavaScript code online for free. Remove whitespace, comments, and shorten variable names to optimize your scripts for production. No signup required.10JSON / CSV ConverterConvert between JSON and CSV formats online for free. Custom delimiters, auto-detection, and nested objects. No signup required.11XML / JSON ConverterConvert between XML and JSON formats online for free. Parse XML to JSON or generate XML from JSON data. No signup required.12YAML / JSON ConverterConvert between YAML and JSON formats online for free. Parse YAML configs to JSON or generate YAML from JSON. No signup required.13CSV ViewerView, search, and analyze CSV files online for free. Get a sortable, filterable table with statistics. No signup required.14Base64 Image Encode / DecodeEncode images to Base64 or decode Base64 to images online for free. Generate data URIs for HTML and CSS. No signup required.15Text Diff CheckerCompare two texts online for free with line-by-line diff highlighting. Spot added and removed lines instantly in your browser. No signup required.16Unix Timestamp ConverterConvert Unix timestamps to human-readable dates and back online for free. Supports seconds and milliseconds, local time and UTC. No signup required.17Number Base ConverterConvert numbers between binary, octal, decimal, and hexadecimal online for free. Instant conversion across all bases at once. No signup required.18HTML Entity Encoder / DecoderEncode and decode HTML entities online for free. Escape special characters for safe markup or unescape entities back to text. No signup required.19Code BeautifierBeautify and format minified HTML, CSS, and JavaScript online for free. Configurable indentation and line wrapping, with automatic language detection. No uploads.20SQL FormatterFormat and beautify SQL queries online for free. Supports MySQL, PostgreSQL, SQL Server, Oracle, BigQuery, Snowflake and more. Runs in your browser — no uploads.21JSON to TypeScriptTurn a JSON sample into TypeScript interfaces, Go structs or Python dataclasses. Detects optional fields across array items. Free, runs in your browser.22XML FormatterFormat or minify XML without losing comments, CDATA or attribute order. Only whitespace changes. Free, runs in your browser.23Cron Expression GeneratorTranslate cron expressions into plain English and preview the next five run times. Presets for common schedules. Free, runs in your browser.24Markdown EditorWrite markdown with a live side-by-side preview. GitHub-flavoured, sanitised rendering, export as .md or standalone HTML. Free, no signup.25Markdown ↔ HTML ConverterConvert HTML to Markdown or Markdown to HTML. ATX headings, fenced code blocks, sanitised output. Free, runs in your browser.26JSON DiffCompare two JSON documents structurally, ignoring key order and formatting. Shows added, removed and changed values by path. Free, no signup.27.gitignore GeneratorBuild a .gitignore from templates for languages, frameworks, editors and operating systems. Deduplicated automatically. Free, runs in your browser.28HEX to RGB ConverterConvert HEX to RGB, RGB to HEX, HSL, HSV, and CMYK instantly. Free online colour converter with alpha support, live preview, and WCAG contrast check. No signup.
18 tools
Category hub Text Tools
Powerful text manipulation and analysis tools for writers and editors.
01Word CounterFree online word counter and word count checker. Count words, characters, sentences, and paragraphs in real time with reading-time estimates. No signup required.02Character CounterCount characters with and without spaces online for free. Perfect for Twitter, meta descriptions, SMS, and character-limited content. No signup required.03Case ConverterConvert text between uppercase, lowercase, title case, sentence case, and more. Free online text case transformation tool. No signup required.04Duplicate Line RemoverRemove duplicate lines from text online for free. Clean up lists, logs, and data files by eliminating repeated lines instantly. No signup required.05Text SorterSort lines of text alphabetically, numerically, or by length online for free. Organize lists, data, and content instantly. No signup required.06Slug GeneratorGenerate clean, SEO-friendly URL slugs from any text online for free. Perfect for blog posts, product pages, and web content. No signup required.07Lorem Ipsum GeneratorGenerate lorem ipsum placeholder text in paragraphs, sentences, or words. Free tool for designers, developers, and content creators. No signup required.08Grammar CheckerCheck grammar, spelling, and punctuation online for free. Get instant AI-powered suggestions to improve your writing. No signup required.09Find & ReplaceFind and replace text online for free with case-sensitivity and regex support. See live match counts as you type. No installs, no signup required.10Text CleanerClean messy text online for free. Strip extra spaces, blank lines, line breaks, and invisible characters in one click. No installs, no signup required.11Fancy Text GeneratorTurn text into bold, italic, script, small caps and 12 more Unicode styles that paste anywhere. Free, instant, no signup.12Binary, Hex & Morse ConverterConvert text to binary, hexadecimal or Morse code and back. UTF-8 correct, so emoji and accents round-trip. Play Morse as audio. Free.13List RandomizerShuffle a list fairly, pick a random few, or split it into balanced groups. Uses Fisher-Yates with cryptographic randomness. Free, no signup.14Caesar Cipher & ROT13Encode and decode Caesar, ROT13 and Atbash ciphers, with a brute-force panel that ranks all 25 shifts by how English each result reads. Free.15Bionic Reading ConverterConvert text to bionic reading format, emphasising the start of each word. Adjustable emphasis, copy with formatting, export as HTML. Free.16Remove Line BreaksRemove line breaks from text online for free. Join lines wrapped by a PDF while keeping paragraphs intact, rejoin hyphenated words, and strip blank lines. No signup.17Invisible Character RemoverDetect and remove invisible Unicode characters from text — zero-width spaces, BOMs, non-breaking spaces, and bidirectional overrides. Free, private, runs in your browser.18Word Frequency CounterCount word frequency online for free. Get a ranked table of your most-used words with an optional stop-word filter. No installs, no signup required.
15 tools
Category hub Security Tools
Generate hashes, passwords, and check security strength.
01MD5 Hash GeneratorGenerate MD5 hash digests from text or files online for free. Useful for checksums, data integrity verification, and legacy systems. No signup required.02SHA-256 Hash GeneratorGenerate SHA-256 cryptographic hashes from text or files online for free. Industry-standard hashing for security and data integrity. No signup required.03Password GeneratorGenerate strong, random passwords online for free. Customize length, character types, and security level for maximum protection. No signup required.04Password Strength CheckerCheck how strong your password is online for free. Get a detailed security score, estimated crack time, and improvement suggestions. No signup required.05AES Text EncryptionEncrypt and decrypt text with AES-256-GCM and a passphrase. Runs entirely in your browser — neither the message nor the passphrase is ever transmitted.06bcrypt Generator & VerifierGenerate bcrypt password hashes with a configurable cost factor, or verify a password against an existing hash. Runs in your browser, nothing uploaded.07TOTP / 2FA Code GeneratorGenerate time-based 2FA codes from a Base32 secret, with a live countdown and an otpauth:// URI for authenticator apps. Runs in your browser.08File Checksum VerifierCompute SHA-256, SHA-512, SHA-1 and CRC32 for any file and compare against an expected checksum. The file is hashed on your device, never uploaded.09RSA & EC Key Pair GeneratorGenerate RSA or elliptic curve key pairs in PEM and JWK format using the Web Crypto API. Keys are created in your browser and never transmitted.10JWT Generator & SignerCreate and sign JSON Web Tokens with HS256, HS384 or HS512, including expiry, issuer and audience claims. Signed in your browser, nothing uploaded.11SHA-1 & CRC32 GeneratorGenerate SHA-1 and CRC32 checksums from text, in hex and decimal. For legacy verification only — both are unsuitable for security. Free, runs locally.12htpasswd GeneratorGenerate an Apache or Nginx .htpasswd file with bcrypt hashes for multiple users. Runs in your browser — passwords are never transmitted.13SHA-512 Hash GeneratorGenerate SHA-512 and SHA-384 hashes online for free using the Web Crypto API. Hash text instantly in your browser. No uploads, no signup required.14HMAC GeneratorGenerate HMAC-SHA256 and HMAC-SHA512 signatures from a secret key and message online for free. Runs via Web Crypto in your browser. No signup required.15Passphrase GeneratorGenerate secure, memorable word-based passphrases online for free. Choose word count, separators, and numbers — XKCD style. No signup required.
15 tools
Category hub Image Tools
Compress, resize, crop, and convert images right in your browser.
01Image CompressorCompress images online for free with minimal quality loss. Reduce file sizes by up to 80% for faster websites and smaller uploads. No signup required.02Image ResizerResize images to exact dimensions or by percentage online for free. Maintain aspect ratio and quality for any size requirement. No signup required.03Image CropperCrop images online for free. Select any area, use preset aspect ratios, and download the cropped result instantly. No signup required.04PNG to JPG ConverterConvert PNG to JPG online free. Adjust JPEG quality, set a background color for transparent areas, and shrink file size instantly. No signup required.05JPG to PNG ConverterConvert JPG/JPEG images to PNG format online for free. Get lossless quality and transparency support for your images. No signup required.06Image to Base64Convert images to Base64 encoded strings online for free. Generate data URIs for embedding images directly in HTML, CSS, and JavaScript. No signup required.07WEBP ConverterConvert PNG, JPG, GIF, and BMP images to WebP format online for free. Reduce file sizes while maintaining quality. No signup required.08JPEG ConverterConvert PNG, WebP, GIF, and BMP images to JPEG format online for free. Control quality and background color. No signup required.09Background RemoverRemove image backgrounds online for free using AI. Clean cutouts with transparent backgrounds via MediaPipe. No signup required.10SVG to PNG ConverterConvert SVG to PNG online for free. Rasterize SVG files or pasted markup at any scale, right in your browser. No uploads, no signup required.11Image Color PickerPick colors from any image online for free. Click a pixel to get HEX, RGB, and HSL values instantly in your browser. No uploads, no signup required.12EXIF Viewer & RemoverView and remove EXIF data from photos online free. See hidden GPS location, camera model, and timestamps, then strip them losslessly. Nothing is uploaded.13Favicon GeneratorTurn any image into a complete favicon package: a real multi-size .ico, PNGs for every platform, a web manifest, and the HTML snippet. Free.14GIF MakerBuild an animated GIF from images with adjustable frame delay, width, looping and ping-pong. Encoded in your browser — nothing uploaded.15HEIC to JPG ConverterConvert HEIC photos from your iPhone to JPG or PNG online for free. Batch conversion in your browser — no uploads, no watermarks, no signup required.
29 tools
Category hub Utility Tools
Calculators, generators, and everyday utilities for any workflow.
01Age CalculatorCalculate exact age in years, months, and days from any date of birth. Free online age calculator with upcoming birthday countdown. No signup required.02Random Number GeneratorGenerate random numbers online for free. Set custom ranges, generate multiple numbers, and use for lotteries, games, and decisions. No signup required.03Unit ConverterConvert between units of length, weight, temperature, volume, and more online for free. Instant, accurate unit conversion tool. No signup required.04Reading Time CalculatorCalculate how long it takes to read any text online for free. Estimate reading and speaking time based on word count and custom speeds. No signup required.05Color Palette GeneratorFree online color palette generator: build harmonious HSL color schemes, lock swatches you like, and export HEX or CSS variables. No signup required.06Gradient GeneratorCreate beautiful CSS gradients online for free. Design linear and radial gradients with a visual editor and copy the CSS code instantly. No signup required.07CSS Box Shadow GeneratorDesign CSS box shadows visually online for free. Adjust offset, blur, spread, and color to create the perfect shadow effect. No signup required.08QR Code GeneratorGenerate QR codes from any text, URL, or data online for free. Customize colors, size, and error correction. No signup required.09QR Code ScannerScan and decode QR codes online free from an image or your camera. Reads URLs, WiFi, and contacts with clickable results. No app or signup needed.10Barcode GeneratorGenerate barcodes in CODE128, EAN-13, UPC, CODE39, and more formats online for free. Download as SVG or PNG. No signup required.11ATS CV Template GeneratorCreate professional, ATS-friendly CV/resumes online for free. Generate a clean PDF ready for job applications. No signup required.12Online NotepadA distraction-free notepad that autosaves in your browser. Multiple notes, word count, download as .txt. No account, nothing uploaded.13Random Picker WheelSpin a wheel to pick a random name or option. Cryptographically fair, with optional winner removal for draws. Free, runs in your browser.14Invoice GeneratorCreate a professional PDF invoice with line items, tax and discount. Generated in your browser — client details and rates are never uploaded.15Colour Contrast CheckerCheck colour contrast against WCAG 2.1 AA and AAA, with a live text preview and the closest passing colour when a pair fails. Free, no signup.16Pomodoro TimerA Pomodoro timer with custom focus and break lengths, automatic phase switching and a chime. Accurate in background tabs. Free, runs in your browser.17Tip, Discount & Tax CalculatorWork out a tip and split the bill, calculate a discounted price, or add and remove sales tax. Three calculators in one. Free, no signup.18GPA CalculatorCalculate term GPA on the 4.0 scale with credit weighting, plus cumulative GPA from your previous total. Weighted honours option. Free, no signup.19Dice Roller & Coin FlipRoll d4 to d100 with modifiers, or flip coins and track the tally. Cryptographically fair with rejection sampling. Free, runs in your browser.20Date Difference CalculatorCalculate the exact time between two dates in years, months and days, plus total days, weeks, hours and working days. Free, runs in your browser.21Time Zone ConverterCompare times across cities at a glance, with working-hours indicators for scheduling. Daylight saving handled automatically. Free, no signup.22Compound Interest CalculatorProject savings growth with regular contributions, any compounding frequency, and a year-by-year breakdown. Free, runs in your browser.23Aspect Ratio CalculatorCalculate aspect ratios and scale dimensions proportionally. Presets for 16:9, 9:16, 4:3, 1:1 and Open Graph. Free, runs in your browser.24Roman Numeral ConverterConvert numbers to Roman numerals and back, with strict validation that rejects malformed numerals like IIII and IC. Free, runs in your browser.25Number to Words ConverterConvert numbers to written English words, currency wording for cheques, and ordinals. Handles decimals, negatives and very large values. Free.26Percentage CalculatorCalculate percentages online for free: X% of Y, percentage change, and what percent X is of Y. Instant answers in your browser. No signup required.27Loan EMI CalculatorCalculate loan EMI online for free: monthly payment, total interest, and amortization summary for any loan amount, rate, and tenure. No signup required.28BMI CalculatorCalculate your BMI online for free with metric or imperial units. Get your body mass index and weight category instantly. Private, no signup required.29Stopwatch & TimerFree online stopwatch with lap times plus a countdown timer with sound alert. Accurate, full-screen friendly, and runs in your browser. No signup needed.
5 tools
Category hub Video Tools
Record, trim, compress, and capture video — entirely in your browser.
01Screen RecorderRecord your screen, browser tab, or window online for free with optional microphone audio. Download as WebM instantly. No install, no signup required.02Video TrimmerTrim videos online for free by setting start and end points. Cut clips and re-encode to WebM entirely in your browser. No uploads, no signup required.03Video CompressorCompress videos online for free by scaling resolution and bitrate. Shrink file size right in your browser and export WebM. No uploads, no signup required.04Video Frame GrabberCapture any frame from a video as a PNG online for free. Scrub to the exact moment and save a full-quality still in your browser. No signup required.05Video Audio ExtractorExtract the audio track from any video online for free. Convert video sound to an audio file entirely in your browser. No uploads, no signup required.
6 tools
Category hub Audio Tools
Record, trim, convert, and generate audio with zero uploads.
01Voice RecorderRecord audio from your microphone online for free. Preview the take and download it instantly — everything stays in your browser. No signup required.02Audio TrimmerTrim audio files online for free. Cut a section from any MP3, WAV, or OGG file and export as WAV — all in your browser. No uploads, no signup required.03Audio ConverterConvert audio to MP3, WAV, OGG, or WebM online for free. Convert M4A, FLAC, OGG, and WebM files with adjustable MP3 bitrate. Runs in your browser — no uploads, no signup.04Text to SpeechConvert text to natural speech online for free. Choose from your system voices, adjust rate and pitch, and listen instantly. No signup required.05Tone GeneratorGenerate sine, square, sawtooth, and triangle test tones at any frequency online for free. Test speakers and hearing in your browser. No signup required.06Audio MergerJoin multiple audio files into one, with adjustable gaps or crossfades. Sample-exact, no re-compression. Runs in your browser — nothing uploaded.
12 tools
Category hub PDF Tools
Merge, split, rotate, and build PDFs locally — files never leave your device.
01PDF MergerMerge multiple PDF files into one online for free. Reorder documents before combining — everything stays in your browser. No uploads, no signup required.02PDF SplitterSplit PDFs online for free by extracting any page range into a new file. Processing happens entirely in your browser. No uploads, no signup required.03Images to PDFConvert JPG and PNG images into a single PDF online for free. Reorder pages and build the document in your browser. No uploads, no signup required.04PDF RotatorRotate PDF pages by 90, 180, or 270 degrees online for free. Fix all pages or just selected ones in your browser. No uploads, no signup required.05Compress PDFCompress PDF files online for free. Lossless mode keeps text selectable; rasterise mode shrinks scans dramatically. Runs in your browser — nothing uploaded.06Extract Text from PDFExtract text from a PDF online for free. Copy it, or download as .txt with page markers. Tells you honestly when a PDF is a scan with no text to extract.07Unlock PDFRemove a password from a PDF you can already open. AES decryption runs in your browser — the file and the password never leave your device. Free, no signup.08Protect PDFAdd a password to a PDF with AES-256 encryption, and control printing, editing and copying. Encryption runs in your browser — the file is never uploaded.09Delete & Reorder PDF PagesDelete, reorder, and rearrange PDF pages online for free. Drag-free move controls, page thumbnails, and reverse order. Runs in your browser — no uploads.10Add Page Numbers to PDFAdd page numbers to a PDF online for free. Choose position, format like 'Page 1 of 12', starting number, size, and skip the cover page. Runs in your browser.11PDF WatermarkAdd a text watermark to a PDF online for free. Control opacity, angle, size, colour, position, and tiling. Nothing is uploaded — it runs in your browser.12PDF to JPG ConverterConvert PDF pages to JPG, PNG, or WebP images online for free. Choose resolution up to 300 DPI, pick page ranges, download all as a ZIP. Runs in your browser — no uploads.
10 tools
Category hub SEO Tools
Meta tags, structured data, and previews — everything you ship before a page goes live.
01Keyword Density AnalyserAnalyse keyword density with 1-, 2- and 3-word phrases, stop-word filtering, and over-use warnings. Free, runs in your browser, no signup.02XML Sitemap GeneratorTurn a list of URLs into a valid sitemap.xml with lastmod, changefreq and priority. Removes duplicates, validates URLs. Free, runs in your browser.03Hreflang Tag GeneratorGenerate hreflang tags for multilingual sites as HTML, HTTP headers or XML sitemap entries. Validates codes and catches duplicates. Free, no signup.04Redirect GeneratorTurn a list of old and new URLs into 301 redirects for Apache, Nginx, Netlify or Vercel. Detects redirect chains and loops. Free, runs in your browser.05Open Graph Preview & DebuggerPaste your meta tags and see exactly how the link will look on Facebook, LinkedIn and X — plus a check for the mistakes that break social cards. Free.06Schema Markup GeneratorGenerate JSON-LD structured data for Article, FAQ, Product, LocalBusiness, Breadcrumb, HowTo and Organization. Free schema markup generator, no signup.07Robots.txt Generator & TesterGenerate a robots.txt file and test any URL against your rules. Shows exactly which rule wins, using Google's longest-match precedence. Free, no signup.08Readability CheckerCheck readability with Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau and ARI. Free readability scores in your browser, no signup.09UTM Campaign BuilderBuild tagged campaign URLs with utm_source, utm_medium and utm_campaign. Presets, lowercase normalisation, and validation. Free UTM builder, no signup.10Meta Tag GeneratorGenerate SEO meta tags, Open Graph, and Twitter Card markup with a live Google result preview. Pixel-accurate truncation warnings. Free, no signup.
No account. No uploads.
How it works