# TopTool

> Top Free Online Tools — PDF, Documents, Audio, Video & Calculators.

TopTool is a free, no-signup collection of 150+ online tools — file converters, encoders, decoders, calculators, lookups, generators. Every tool runs entirely in the user's browser (no upload to a server) unless the tool description says otherwise. Each tool has its own page at `https://toptool.io/{slug}` and a machine-readable manifest at `https://toptool.io/{slug}/tool.json`.

For LLM agents: a JSON catalog of every tool with input/output schemas and example payloads is available at `https://toptool.io/tools.json`. Each per-tool page also embeds JSON-LD with `potentialAction` describing how to invoke the tool. A REST/MCP execution API is planned — for now, tools execute client-side via the web UI at the tool's URL.

## Discovery endpoints

- [`/tools.json`](https://toptool.io/tools.json) — JSON catalog of every tool with full schemas
- [`/sitemap.xml`](https://toptool.io/sitemap.xml) — every URL on the site
- [`/rss.xml`](https://toptool.io/rss.xml) — latest blog posts as RSS
- [`/{slug}/tool.json`](https://toptool.io/png-to-jpg/tool.json) — per-tool machine-readable manifest (replace `png-to-jpg` with any slug)
- [`/category/{id}`](https://toptool.io/category/image) — category index (image, document, audio, video, text, diagram, color, dev, calc, payment)

## Document (55)

> Convert documents between Markdown, PDF, DOCX, HTML, CSV, JSON, YAML and more.

- [CSV to HTML Table](https://toptool.io/csv-to-html): Convert a CSV spreadsheet into a styled HTML table — free online, no upload.
- [CSV to JSON](https://toptool.io/csv-to-json): Convert CSV files to pretty-printed JSON — free online, no upload.
- [CSV to Markdown Table](https://toptool.io/csv-to-markdown): Convert a CSV spreadsheet into a GitHub-flavored Markdown table — free online, no upload.
- [CSV to TSV](https://toptool.io/csv-to-tsv): Convert a comma-separated file to tab-separated (TSV) — free online, no upload.
- [CSV to XLSX](https://toptool.io/csv-to-xlsx): Convert a CSV file into an Excel .xlsx workbook — free online, no upload.
- [CSV to XML](https://toptool.io/csv-to-xml): Convert a CSV spreadsheet into a well-formed XML document — free online, no upload.
- [CSV to YAML](https://toptool.io/csv-to-yaml): Convert CSV files to YAML — free online, no upload.
- [Word (DOCX) to HTML](https://toptool.io/docx-to-html): Convert a Word (.docx) document into a styled HTML page — free online, no upload.
- [Word (DOCX) to Markdown](https://toptool.io/docx-to-md): Convert a Word (.docx) document into clean Markdown — free online, no upload.
- [Word (DOCX) to PDF](https://toptool.io/docx-to-pdf): Convert a Word (.docx) document to a styled PDF — free, online, no upload.
- [Word (DOCX) to Text](https://toptool.io/docx-to-txt): Extract the plain text from a Word (.docx) document — free online, no upload.
- [Edit PDF](https://toptool.io/edit-pdf): Edit a PDF by adding text to any page locally in your browser. No upload required.
- [File Divider](https://toptool.io/file-divider): Split any file into smaller downloadable parts in your browser, with no upload.
- [HTML to Markdown](https://toptool.io/html-to-md): Convert HTML files into clean Markdown (.md) — free online, no upload.
- [HTML to PDF](https://toptool.io/html-to-pdf): Convert HTML files to nicely-paginated PDF documents — free online, no upload.
- [Images to PDF](https://toptool.io/images-to-pdf): Combine PNG / JPG / WebP images into a single PDF — one image per page, in your browser.
- [JSON to CSV](https://toptool.io/json-to-csv): Convert a JSON array (or object) into a CSV spreadsheet — free online, no upload.
- [JSON to HTML](https://toptool.io/json-to-html): Pretty-print JSON inside a styled, syntax-highlighted HTML document — free online, no upload.
- [JSON to TOML](https://toptool.io/json-to-toml): Convert JSON files to TOML configuration format — free online, no upload.
- [JSON to XLSX](https://toptool.io/json-to-xlsx): Convert a JSON file into an Excel .xlsx workbook — free online, no upload.
- [JSON to XML](https://toptool.io/json-to-xml): Convert JSON to XML — free online, no upload.
- [JSON to YAML](https://toptool.io/json-to-yaml): Convert JSON to YAML — free online, no upload.
- [MarkItDown](https://toptool.io/markitdown): Convert PDFs, Office files, web pages, data files, ebooks, archives and images into clean Markdown.
- [Markdown to HTML](https://toptool.io/md-to-html): Convert Markdown (.md) files into a styled, standalone HTML document — free online, no upload.
- [Markdown to PDF](https://toptool.io/md-to-pdf): Convert Markdown (.md) files to nicely-styled PDF documents — free online, no upload.
- [Markdown to Text](https://toptool.io/md-to-txt): Strip Markdown formatting and download a plain-text (.txt) file — free online, no upload.
- [Add Page Numbers to PDF](https://toptool.io/pdf-add-page-numbers): Stamp page numbers onto a PDF — pick position, format and start number, all in your browser.
- [Add Watermark to PDF](https://toptool.io/pdf-add-watermark): Stamp a text watermark across every page of a PDF — in your browser, no upload.
- [Compress PDF](https://toptool.io/pdf-compress): Shrink a PDF by rasterizing pages to JPEG at a chosen DPI — all in your browser.
- [Delete PDF Pages](https://toptool.io/pdf-delete-pages): Remove specific pages or ranges from a PDF — in your browser, with no upload.
- [Extract PDF Pages](https://toptool.io/pdf-extract-pages): Pull selected pages out of a PDF into a new, smaller PDF — entirely in your browser.
- [Merge PDF](https://toptool.io/pdf-merge): Combine multiple PDF files into a single PDF — in the order you select them, all in your browser.
- [Edit PDF Metadata](https://toptool.io/pdf-metadata-editor): Update a PDF's Title, Author, Subject and Keywords — all in your browser.
- [Reorder PDF Pages](https://toptool.io/pdf-reorder-pages): Rearrange the pages of a PDF into any order — all in your browser, no upload.
- [Rotate PDF Pages](https://toptool.io/pdf-rotate-pages): Rotate selected pages of a PDF by 90, 180 or 270 degrees — in your browser.
- [Split PDF](https://toptool.io/pdf-split): Split a PDF into one file per page, or by custom page ranges — bundled in a ZIP, in your browser.
- [PDF to Word (DOCX)](https://toptool.io/pdf-to-docx): Extract text from a PDF and re-package it as an editable Word .docx — free, online, no upload.
- [PDF to Images](https://toptool.io/pdf-to-images): Extract every page of a PDF as a PNG image — bundled in a single ZIP, in your browser.
- [PDF to JPG](https://toptool.io/pdf-to-jpg): Render every page of a PDF as a JPG — tunable quality, packed in a ZIP, runs online.
- [PDF to PNG](https://toptool.io/pdf-to-png): Render every page of a PDF as a PNG image — lossless, packed in a ZIP, runs online.
- [PDF to TXT](https://toptool.io/pdf-to-txt): Extract the text layer from a PDF as a plain-text (.txt) file — free online, no upload.
- [Unlock PDF](https://toptool.io/pdf-unlock): Strip permission restrictions (print/copy/edit) from a PDF — in your browser, no upload.
- [Sign PDF](https://toptool.io/sign-pdf): Add a typed signature block to a PDF locally in your browser. No upload required.
- [TOML to JSON](https://toptool.io/toml-to-json): Convert TOML configuration files to JSON — free online, no upload.
- [TSV to CSV](https://toptool.io/tsv-to-csv): Convert a tab-separated file to standard CSV — free online, no upload.
- [TXT to HTML](https://toptool.io/txt-to-html): Wrap a plain-text file in a styled, standalone HTML document — free online, no upload.
- [Text to Markdown](https://toptool.io/txt-to-md): Wrap a plain-text (.txt) file in a Markdown document — free online, no upload.
- [TXT to PDF](https://toptool.io/txt-to-pdf): Convert plain-text (.txt) files to a clean, paginated PDF — free online, no upload.
- [XLSX to CSV](https://toptool.io/xlsx-to-csv): Convert an Excel spreadsheet (.xlsx / .xls) to a CSV file — free online, no upload.
- [XLSX to JSON](https://toptool.io/xlsx-to-json): Convert an Excel spreadsheet (.xlsx / .xls) to pretty-printed JSON — free online, no upload.
- [XML to JSON](https://toptool.io/xml-to-json): Convert XML to pretty-printed JSON — free online, no upload.
- [XML to YAML](https://toptool.io/xml-to-yaml): Convert an XML document to clean, readable YAML — free online, no upload.
- [YAML to CSV](https://toptool.io/yaml-to-csv): Convert a YAML list into a CSV spreadsheet — free online, no upload.
- [YAML to JSON](https://toptool.io/yaml-to-json): Convert YAML to pretty-printed JSON — free online, no upload.
- [YAML to XML](https://toptool.io/yaml-to-xml): Convert YAML to a well-formed XML document — free online, no upload.

## Audio (20)

> Convert audio between MP3, WAV, OGG, FLAC, AAC, M4A, OPUS.

- [AAC to MP3](https://toptool.io/aac-to-mp3): Convert AAC or M4A audio to MP3 — free online, no upload.
- [AAC to WAV](https://toptool.io/aac-to-wav): Convert AAC audio (.aac, .m4a) to uncompressed WAV — free online, no upload.
- [Audio Divider](https://toptool.io/audio-divider): Split MP3, WAV, M4A, AAC, OGG, FLAC, and OPUS audio into clips in your browser.
- [Audio Trimmer](https://toptool.io/audio-trimmer): Cut a clip from an audio file — MP3, WAV, OGG, FLAC, M4A, AAC.
- [FLAC to MP3](https://toptool.io/flac-to-mp3): Convert FLAC lossless audio to MP3 — free online, no upload.
- [FLAC to OGG](https://toptool.io/flac-to-ogg): Convert FLAC lossless audio to Ogg Vorbis — free online, no upload.
- [FLAC to WAV](https://toptool.io/flac-to-wav): Convert FLAC lossless audio to uncompressed WAV — free online, no upload.
- [M4A to MP3](https://toptool.io/m4a-to-mp3): Convert M4A audio (AAC in MP4) to MP3 — free online, no upload.
- [M4A to WAV](https://toptool.io/m4a-to-wav): Convert M4A audio to uncompressed WAV — free online, no upload.
- [MP3 to AAC](https://toptool.io/mp3-to-aac): Convert MP3 audio to AAC with selectable bitrate — free online, no upload.
- [MP3 to FLAC](https://toptool.io/mp3-to-flac): Convert MP3 audio to FLAC (lossless) — free online, no upload.
- [MP3 to M4A](https://toptool.io/mp3-to-m4a): Convert MP3 audio to M4A (AAC in MP4 container) — free online, no upload.
- [MP3 to OGG](https://toptool.io/mp3-to-ogg): Convert MP3 audio to Ogg Vorbis — free online, no upload.
- [MP3 to Opus](https://toptool.io/mp3-to-opus): Convert MP3 audio to Opus with selectable bitrate — free online, no upload.
- [MP3 to WAV](https://toptool.io/mp3-to-wav): Convert MP3 audio to uncompressed WAV — free online, no upload.
- [OGG to MP3](https://toptool.io/ogg-to-mp3): Convert Ogg Vorbis audio to MP3 with selectable quality — free online, no upload.
- [OGG to WAV](https://toptool.io/ogg-to-wav): Convert Ogg Vorbis audio to uncompressed WAV — free online, no upload.
- [WAV to FLAC](https://toptool.io/wav-to-flac): Convert WAV audio to FLAC (lossless, smaller files) — free online, no upload.
- [WAV to MP3](https://toptool.io/wav-to-mp3): Convert WAV audio to MP3 with selectable VBR quality — free online, no upload.
- [WAV to OGG](https://toptool.io/wav-to-ogg): Convert WAV audio to Ogg Vorbis — free online, no upload.

## Video (26)

> Convert video between MP4, MKV, WEBM, MOV, AVI — and extract audio or make GIFs.

- [AVI to MP3](https://toptool.io/avi-to-mp3): Extract the audio track from an AVI video as an MP3 file — free online.
- [AVI to MP4](https://toptool.io/avi-to-mp4): Convert AVI video to MP4 (H.264 + AAC) — free, runs entirely in your browser.
- [Facebook Video Downloader](https://toptool.io/facebook-video-downloader): Find direct links for public Facebook videos when available formats can be discovered.
- [Instagram Video Downloader](https://toptool.io/instagram-video-downloader): Analyze public Instagram Reels, posts, and videos and open direct source links when available.
- [Kick Video Downloader](https://toptool.io/kick-video-downloader): Analyze public Kick clips and videos and get direct source links when available.
- [MKV to MP4](https://toptool.io/mkv-to-mp4): Convert MKV (Matroska) video to MP4 (H.264 + AAC) — free, runs in your browser.
- [MOV to MP3](https://toptool.io/mov-to-mp3): Extract the audio track from a MOV video as an MP3 file — free online.
- [MOV to MP4](https://toptool.io/mov-to-mp4): Convert MOV (QuickTime) video to MP4 (H.264 + AAC) — free online.
- [MP4 to AAC](https://toptool.io/mp4-to-aac): Extract the AAC audio track from an MP4 video — free online, no re-encode.
- [MP4 to FLAC](https://toptool.io/mp4-to-flac): Extract the audio track from an MP4 video as a FLAC file — free online.
- [MP4 to GIF](https://toptool.io/mp4-to-gif): Convert MP4 video to an animated GIF — free online, with a tuned palette.
- [MP4 to MKV](https://toptool.io/mp4-to-mkv): Remux MP4 to Matroska (MKV) — fast, lossless, no re-encoding.
- [MP4 to MOV](https://toptool.io/mp4-to-mov): Convert MP4 video to MOV (QuickTime) — free online, no upload.
- [MP4 to MP3](https://toptool.io/mp4-to-mp3): Extract the audio track from an MP4 video as an MP3 file — free online.
- [MP4 to WAV](https://toptool.io/mp4-to-wav): Extract the audio track from an MP4 video as an uncompressed WAV file.
- [MP4 to WebM](https://toptool.io/mp4-to-webm): Convert MP4 video to WebM (VP9 + Opus) — free, runs entirely in your browser.
- [Online Video Downloader](https://toptool.io/online-video-downloader): Download public videos from YouTube, Instagram, TikTok, Facebook, Twitch, Kick, X/Twitter, Vimeo, Reddit, and more without storing files on Toolsly.
- [TikTok Video Downloader](https://toptool.io/tiktok-video-downloader): Find direct links for public TikTok videos without storing the media on Toolsly.
- [Twitch Clip Downloader](https://toptool.io/twitch-clip-downloader): Find direct source links for public Twitch clips, VODs, and videos.
- [Compress Video](https://toptool.io/video-compress): Shrink a video file by re-encoding to H.264 with a quality preset — free, in-browser.
- [Video Divider](https://toptool.io/video-divider): Split MP4, WebM, MOV, MKV, and AVI videos into clips in your browser.
- [Browser Video Editor](https://toptool.io/video-editor): Edit a video in your browser with a simple timeline, trim controls, audio attachments, and MP4 export.
- [Video Trimmer](https://toptool.io/video-trimmer): Cut a clip from a video file — MP4, WEBM, MKV, MOV, AVI — in your browser.
- [WEBM to MP3](https://toptool.io/webm-to-mp3): Extract the audio track from a WEBM video as an MP3 file — free online.
- [WebM to MP4](https://toptool.io/webm-to-mp4): Convert WebM video to MP4 (H.264 + AAC) — free online, no upload.
- [YouTube Shorts Downloader](https://toptool.io/youtube-shorts-downloader): Find direct video and audio links for public YouTube Shorts without storing files on Toolsly.

## Color (15)

> Color converters, palette generators, gradient builders, WCAG contrast — everything for picking the right hex.

- [Analogous Colors Generator](https://toptool.io/analogous-colors): Generate an analogous 3-color palette (±30° hue) from any base color — instant, local.
- [Color Blender](https://toptool.io/color-blender): Blend two colors together with an adjustable ratio — mix in RGB or HSL color space and see hex, RGB, HSL output.
- [Color Blindness Simulator](https://toptool.io/color-blindness-simulator): Simulate how any color looks to people with color blindness — protanopia, deuteranopia and tritanopia.
- [Color Converter](https://toptool.io/color-converter): Convert any color (hex, rgb, hsl, hsv, named) to every common format at once — runs locally in your browser.
- [Color Name Finder](https://toptool.io/color-name-finder): Find the closest standard CSS named color (out of 148) for any hex / rgb / hsl input.
- [Complementary Color Generator](https://toptool.io/complementary-color): Find the complementary (opposite) color for any hex / rgb / hsl input — instant, free, no upload.
- [CSS Gradient Generator](https://toptool.io/gradient-generator): Build a linear or radial CSS gradient between two colors with custom angle and stop count.
- [HSV Color Picker](https://toptool.io/hsv-color-picker): Convert HSV (Hue, Saturation, Value) to Hex, RGB, HSL, and Tailwind — runs locally in your browser.
- [Material Design Palette Generator](https://toptool.io/material-palette): Generate a 10-step Material Design tonal palette (50–900) from any base color.
- [Random Color Generator](https://toptool.io/random-color): Generate N cryptographically-random colors with optional pastel / vibrant / dark / light constraints.
- [Shade & Tint Generator](https://toptool.io/shade-tint-generator): Generate N evenly-spaced shades (darker) and tints (lighter) of any base color — runs locally.
- [Tailwind Color Finder](https://toptool.io/tailwind-color-finder): Find the closest Tailwind v3 utility class (e.g. bg-emerald-600) for any hex / rgb / hsl color.
- [Tailwind Palette Extractor](https://toptool.io/tailwind-palette-extractor): Generate a full 11-shade Tailwind-style palette (50–950) from any single hex color.
- [Triadic Colors Generator](https://toptool.io/triadic-colors): Generate a balanced 3-color triadic palette from any base color — runs locally, free.
- [WCAG Contrast Checker](https://toptool.io/wcag-contrast-checker): Check WCAG 2.1 contrast ratio for any foreground/background pair — AA & AAA, normal & large text.

## Calculators (34)

> Everyday calculators — BMI, percentage, age, tip, date diff.

- [Age Calculator](https://toptool.io/age-calculator): Compute your age in years, months, and days from a date of birth — plus total days lived.
- [Aspect Ratio Calculator](https://toptool.io/aspect-ratio-calculator): Compute aspect ratios and resize dimensions while preserving the original proportion — 16:9, 4:3, 21:9 and more.
- [BMI Calculator](https://toptool.io/bmi-calculator): Compute Body Mass Index from height and weight in either metric or imperial units.
- [Bytes Converter](https://toptool.io/bytes-converter): Convert between bytes, KB, MB, GB, TB and their binary counterparts KiB, MiB, GiB, TiB.
- [Coin Flip](https://toptool.io/coin-flip): Flip a virtual coin once or hundreds of times — cryptographically random, fair 50/50 odds.
- [Compound Interest Calculator](https://toptool.io/compound-interest-calculator): Project savings/investment growth with compound interest — set principal, annual rate, years, compounding frequency and optional monthly contribution.
- [Countdown Timer (Time Until)](https://toptool.io/countdown-timer): Calculate how much time until a date — days, hours, minutes, seconds. Heads up: it's a calculator, not a live ticking countdown.
- [Date Difference Calculator](https://toptool.io/date-difference): Compute the difference between two dates in years, months, days, hours, minutes, seconds.
- [Dice Roller](https://toptool.io/dice-roller): Roll d4, d6, d8, d10, d12, d20 or d100 dice — D&D notation like 3d6+2 supported via the modifier field.
- [Discount Calculator](https://toptool.io/discount-calculator): Compute the sale price after a percent discount — supports stacked discounts and an optional sales-tax / VAT addition.
- [Electricity Cost Calculator](https://toptool.io/electricity-cost-calculator): Calculate your electricity cost from watts, usage hours and rate per kWh — see daily, monthly and yearly estimates instantly.
- [Fuel Cost Calculator](https://toptool.io/fuel-cost-calculator): Calculate the fuel cost for any trip — enter distance, fuel efficiency and price per gallon or liter to see total cost and fuel needed.
- [GPA Calculator](https://toptool.io/gpa-calculator): Calculate your GPA from letter grades and credit hours — supports A+ through F on the standard 4.0 scale.
- [Huawei Unlock Code Calculator](https://toptool.io/huawei-unlock-code-calculator): Calculate Huawei modem NCK unlock codes for v1, v2, and v201 algorithms, plus the flash code, from a valid IMEI.
- [IMEI Generator](https://toptool.io/imei-generator): Generate valid-format test IMEI numbers with correct Luhn check digits for QA, forms, and modem calculator testing.
- [IMEI Validator](https://toptool.io/imei-validator): Validate a 15-digit IMEI with the Luhn check digit and extract the TAC, serial number, and reporting body prefix.
- [Length Converter](https://toptool.io/length-converter): Convert between metric and imperial length units — mm, cm, m, km, inches, feet, yards, miles.
- [Loan & Mortgage Calculator](https://toptool.io/loan-mortgage-calculator): Compute monthly payment, total interest, and the amortization schedule for any fixed-rate loan or mortgage.
- [Number to Words Converter](https://toptool.io/number-to-words): Convert any number to English words — supports up to trillions, decimals, negatives, and ordinals.
- [Percentage Calculator](https://toptool.io/percentage-calculator): Compute percent of a number, the percentage one number is of another, and percentage change.
- [Pomodoro Timer (Schedule Calculator)](https://toptool.io/pomodoro-timer): Plan a pomodoro study session — how many cycles, work + break minutes, total time. It's a planner, not a ticking timer.
- [Random Picker](https://toptool.io/random-picker): Pick random items from a list — names, options, prizes. Cryptographically fair, with or without duplicates.
- [Roman Numeral Converter](https://toptool.io/roman-numeral-converter): Convert between Roman numerals and integers — validates input and handles values from 1 to 3,999.
- [Salary Converter](https://toptool.io/salary-converter): Convert between hourly, daily, weekly, biweekly, monthly and annual salary — adjust hours/week and weeks/year.
- [Scientific Notation Converter](https://toptool.io/scientific-notation-converter): Convert between standard numbers and scientific notation — see mantissa, exponent, and both forms instantly.
- [Speed Converter](https://toptool.io/speed-converter): Convert between m/s, km/h, mph, knots and ft/s — covers driving, flying, sailing and physics units.
- [Stopwatch (Duration Calculator)](https://toptool.io/stopwatch): Format, add, or subtract durations like '1:23:45' or '1h 30m'. Heads up — this is a calculator, not a live stopwatch.
- [Temperature Converter](https://toptool.io/temperature-converter): Convert between Celsius, Fahrenheit, Kelvin and Rankine using the exact formulas, not approximations.
- [Time Zone Meeting Planner](https://toptool.io/time-zone-meeting-planner): Find overlapping working hours across two time zones to schedule meetings — free, runs in your browser.
- [Timezone Converter](https://toptool.io/timezone-converter): Convert a time from any timezone to any other — Central to Pacific, UTC to Tokyo, you name it.
- [Tip Calculator](https://toptool.io/tip-calculator): Calculate tip and split a restaurant bill across any number of people.
- [VAT / Sales Tax Calculator](https://toptool.io/vat-tax-calculator): Add VAT/sales tax to a net amount, or extract VAT from a gross amount — also derives the tax portion as a standalone figure.
- [Volume Converter](https://toptool.io/volume-converter): Convert between mL, L, cubic meters, US fluid ounces, cups, pints, quarts, and gallons (US + Imperial).
- [Weight Converter](https://toptool.io/weight-converter): Convert between metric and imperial weight units — mg, g, kg, tonnes, ounces, pounds, stone, US tons.

## Notes for agents

- All tools are free. No API key is required to view the catalog or per-tool manifests.
- File-conversion tools accept an input `File` (multipart/form-data via the web UI) and produce a downloadable result.
- Utility tools (calculators, decoders, lookups) accept structured form inputs and return structured output values.
- The catalog is regenerated whenever the tool registry is updated. Cache it for up to 24 hours.
- Attribution is appreciated but not required — please link back to https://toptool.io where possible.