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The library

Tools

No categories to guess at, no upsell between you and the button. Filter it down, open one, get your file back.

47

tools live

38

run on-device

8

categories

0

accounts needed

showing 47 of 47 tools

text / url → AI score

AI Content Detector

Free AI content detector for pasted text or a live URL — get an explainable AI score, evidence, and sentence-level analysis.

on-device Open
under 15s per URL

AI Readability Checker

The best free readability checker — scores content with 7 formulas, checks AI crawler accessibility across GPTBot, ClaudeBot and PerplexityBot, and flags hard paragraphs with fix suggestions.

server · 1h delete Open
avif → jpg

AVIF to JPG

Convert AVIF images to JPG right in your browser — no upload, no limit. Batch-convert, pick the background colour for any transparent areas, and download as a ZIP.

on-device Open
avif → png

AVIF to PNG

Convert AVIF images to PNG right in your browser — lossless, no upload, no limit. Keeps transparency, batch-convert, and download as a ZIP.

on-device Open
avif → webp

AVIF to WebP

Convert AVIF images to WebP, which older software and editors will actually open.

on-device Open
site → link report

Broken Link Checker

Crawl your whole site and find every broken link — and see exactly which page each one sits on. Live results, redirects flagged separately, CSV export.

server · 1h delete Open
server · live public data

Bulk Domain Authority Checker

Check Domain Authority, spam risk and domain age for up to 100 URLs at once. Every score comes with the exact signals behind it — no black box, no captcha, no signup.

on-device Open
URLs → Status Report

Bulk URL Status Code Checker

Paste up to 500 URLs and instantly see status codes, redirect chains, soft‑404 warnings, response times, and headers — 100% free, no sign‑up.

server · 1h delete Open
image → smaller

Compress Image

Shrink images by quality level or to a target file size, and compare before and after at full zoom before you download.

on-device Open

Crop Image

Crop images to any shape or ratio — square, 16:9, circle, or an exact pixel size — at full resolution, right in your browser. Batch, private, no upload, no watermark.

on-device Open

Extract URLs from Text

Paste messy text, an email, a log or HTML and pull out every link. Get URLs, domains or emails, dedupe and sort, copy or download. Everything runs in your browser.

on-device Open
URL / Website

Google Index Status Checker

Check Google index status, crawl details, coverage, sitemap status, and indexing issues for your URLs.

on-device Open
heic → jpg

HEIC to JPG

Convert iPhone HEIC photos to JPG, the format that opens and prints anywhere — with a background colour choice for any transparent areas.

on-device Open
heic → pdf Pro

HEIC to PDF

Combine iPhone HEIC photos into one PDF, with page size, orientation and how many images sit on each page all up to you.

server · 1h delete Open
heic → png

HEIC to PNG

Convert iPhone HEIC photos to PNG, the lossless format that opens in any editor.

on-device Open
heic → webp New

HEIC to WebP

Convert iPhone HEIC photos straight to WebP at a quality level you choose, without going through JPG first.

server · 1h delete Open
urls → hreflang

hreflang Tag Generator

Generate correct hreflang tags for multilingual and multi-region sites — as HTML link tags or an XML sitemap block — with validation that catches the mistakes Google flags.

on-device Open

Image Color Picker

Pick any color from an image and get HEX, RGB, HSL, HSV and CMYK — with a magnifier, one-click copy and an auto palette. Everything stays in your browser, nothing uploaded.

on-device Open
image → pdf

Image to PDF

Combine JPG, PNG, WebP or HEIC images into one PDF, with page size, orientation and images-per-page under your control.

on-device Open
jpg → webp

JPG to WebP

Turn JPG photos into WebP at a quality level you choose, with the size saving shown before you download.

on-device Open
json -> json.min

JSON minifier

Minify JSON, beautify it back, and see the real compressed size. Flags duplicate keys your parser silently drops.

on-device Open
escaped -> json

JSON Stringify and Unstringify

Escape JSON into a string, or peel every layer of escaping off a log payload. Handles double and triple escaping.

on-device Open
jwt -> claims

JWT Decoder

Read a JSON Web Token's header and payload with every claim explained and the expiry counted down live.

on-device Open
site → llms.txt New

llms.txt Generator

Build a clean, spec-compliant llms.txt — the curated file that tells ChatGPT, Claude and Perplexity which of your pages matter. Discover pages, keep the best, describe them, export

on-device Open
Front Matter → Validated + Sanitized

Markdown Front-Matter Validator and Sanitizer

Paste Markdown front matter and instantly validate YAML, TOML, or JSON syntax, auto-fix common mistakes, check required fields per site generator, and export a JSON Schema — 100% free, runs entirely in your browser.

on-device Open
.md → rendered

Markdown Viewer

Open .md files in your browser and read them rendered — tables, code blocks, and syntax highlighting included. Shows document stats and catches structural issues. Nothing is uploaded.

on-device Open
URL → meta tag report

Meta Tag Checker

Analyze meta tags, preview SERP and social cards, detect cloaking, and generate optimized meta tag code — for up to 10 URLs at once.

on-device Open
30 seconds per URL

Open Graph Checker

See exactly what Facebook, X, LinkedIn, WhatsApp and Slack will render — with real image dimensions decoded from the bytes, not just the meta tags. Detects cloaking, WhatsApp size drops, and image mismatches nobody else catches.

server · 1h delete Open
png → webp

PNG to WebP

Turn PNGs into much smaller WebP files with transparency intact, at a quality level you choose.

on-device Open
resize

Resize Image

Resize or crop images by pixels, percentage, or a preset size — right in your browser. Batch, private, no upload, no watermark. Download individually or as a ZIP.

on-device Open
rules → robots.txt

robots txt Generator

Build a valid robots.txt with the right allow/disallow rules, crawl-delay and sitemap line — with warnings for the mistakes that accidentally block your whole site from Google.

on-device Open

Rotate & Flip Image

Rotate images 90° or 180°, straighten a crooked shot, or flip them — right in your browser. Batch, private, no upload, no watermark. Fixes sideways phone photos for good.

on-device Open
details → JSON-LD

Schema Markup Generator

Build clean, valid Schema.org JSON-LD for rich results and AI answer engines — Article, Product, Local Business, FAQ, Event and more, with empty fields dropped automatically.

on-device Open
under 15s

Schema Validator

The best free schema validator — checks JSON-LD, Microdata, and RDFa against schema.org v30 and Google's 2026 rules, plus content parity and AI-crawler visibility.

server · 1h delete Open
Free · No signup

SEO Audit Checker

Free SEO + AEO audit with 5-crawler cloaking detection, AI citation scoring, and Core Web Vitals. No signup.

server · 1h delete Open
title + meta → google preview

SERP Snippet Preview

See how your title and meta description will look on Google — measured by real pixel width, on desktop and mobile. Free, instant, nothing uploaded.

on-device Open
Free · Runs in your browser · No signup

Sitemap Duplicate Content Scanner

Paste a sitemap URL and get every near-duplicate and cannibalizing page pair on your site — compared page by page, right in your browser.

on-device Open
30-90 seconds New

Sitemap Validator

Free sitemap validator that actually fetches every URL. Checks XML syntax, live URL health, robots.txt, and hreflang across Google, GPTBot, ClaudeBot & PerplexityBot. No signup.

server · 1h delete Open

SVG Minifier

Minify and clean SVG files in your browser. Remove editor bloat, optimize numbers and colors, clean unused attributes, and keep your SVGs scalable.

on-device Open
url → redirect report

Trailing Slash Checker

Crawl your site and find every URL that redirects only because of a missing or extra trailing slash — with the exact page still linking to it, not just the redirect itself.

on-device Open
epoch -> date

Unix Timestamp Converter

Convert epoch timestamps to dates and back, with seconds, milliseconds, micro and nanoseconds detected for you.

on-device Open

URL Encoder Decoder

Encode or decode URLs and query values — Component, Full URL or Form mode, single or batch. Decodes recursively, breaks a URL into its parameters, and runs entirely in your browser.

on-device Open
mp4/webm/mov → jpg/png/webp

Video to Frames Extrator

Pull frames out of any video — every frame or a custom rate — and download them as images. Runs fully in your browser.

on-device Open
webp → jpg

WebP to JPG

Convert WebP images to JPG so they open in any app, editor or printer — with control over the background colour, since JPG can't keep transparency.

on-device Open
webp → pdf

WebP to PDF

Bundle WebP images into a single PDF, with page size, orientation and how many sit on each page up to you.

on-device Open
webp → png

WebP to PNG

Convert WebP images to lossless PNG that opens in any editor — transparency kept intact, with an option to shrink the file by reducing colours.

on-device Open
site → sitemap.xml

XML Sitemap Generator

Build a valid XML sitemap by discovering your pages automatically or pasting a URL list — with lastmod, priority, and automatic splitting for sites over 50,000 URLs.

on-device Open

One tool, one job

Most file tasks are small. Turn this into that, make this smaller, pull these together. They do not need a dashboard, a project, an account or a subscription, and they certainly do not need you to hand a private file to a server before you can get on with your day. Every tool in this library is built for exactly one of those small jobs and nothing else. Open it, do the thing, close the tab. There is no second screen trying to sell you the rest of a suite.

The list above grows as tools are added. Rather than sort them into folders you have to guess your way through, everything sits on one page: filter by category, or type the job you have — a format, an action, a file type — and the list narrows as you go. Pressing the search shortcut opens the same thing from anywhere on the site.

Everything runs in your browser

This is the one promise the whole library is built on, so it is worth being precise about it. The code that does the work arrives with the page and runs on your own device, using your own processor and memory. Your file is opened by the tab in front of you and is never sent anywhere. There is no upload, which means there is no copy of your file sitting on a disk you cannot see, no retention window anyone has to promise to honour, and no breach that could one day expose a folder of your documents. It also means the tools are as fast as your machine, not as fast as a shared server on a busy afternoon.

You do not have to believe any of that, which is the point of doing it this way. Open a tool, wait for it to finish loading, then switch on airplane mode or pull your network cable. Do the job anyway. It still works, because nothing was ever going to be sent. That check takes about ten seconds and it is the only guarantee on this site you can verify with your own eyes rather than take on trust.

A small number of jobs genuinely cannot run on your device, and where that is ever the case the tool says so plainly, above the controls, before you start — never buried in a policy. If a tool does not carry that warning, it ran locally and your file stayed with you.

No account, no watermark, no catch

Nothing here asks you to sign up. There is no free tier that quietly stops working at the third file, no watermark stamped across the result, no size cap that exists only so a paid plan can lift it. Because the work happens on your device, there is no server cost to recover and therefore nothing to gate. You can use any tool as many times as you like, on as many files as your device can hold in memory at once.

That last part is the only real limit worth knowing. The ceiling is your hardware, not a rule imposed here: a phone will handle a modest batch comfortably, a laptop will work through a large one without complaint. If something very large stalls or the tab reloads itself, split the batch in half and run it twice.

Built to be readable, not clever

Every tool aims to do the obvious thing by default and explain the few choices it offers in plain language. Where a setting changes the result — a quality level, a page size, an output format — it is shown up front with a sensible default already chosen, so the tool is useful the moment it loads and adjustable only if you want to adjust it. Nothing important is hidden behind a menu, and nothing asks you to read documentation before you can convert a single file.

The library keeps growing

New tools are added over time, grouped into broad categories so the page stays navigable as the list gets longer. If the tool you need is not here yet, there is a request form at the bottom of this page. Say what you are starting with, what you need to end up with, and what usually goes wrong when you try it elsewhere. Requests are read every week, and the job that gets asked for most is the one that gets built next. A good description of a real problem is worth more than a vote — it is often the thing that shows exactly what the tool has to handle.

Are these tools actually free?

Yes. Every tool in this list is free to use, with no account, no sign-up wall and no watermark stamped on the output. There is no paid tier that unlocks a bigger file or removes a queue, because there is no queue and no upload limit to sell you past.

Do my files get uploaded to a server?

No. Every tool listed here does its work in your browser, using your own device's processor. The file is never sent anywhere, which means there is nothing on our side to store, sell, leak or promise to delete in an hour. The check takes ten seconds: load a tool, disconnect from the internet, and convert anyway. It still works.

Is there a file size limit?

There is no cap we impose. The real ceiling is how much memory your device can spare: a phone will handle a handful of large photos comfortably, a laptop will chew through hundreds. If a big batch stalls or the tab reloads, split it in half and run it twice.

Can I convert more than one file at a time?

Yes. Drop in a whole folder's worth. Each file converts in turn with its own progress bar, and you can either save them one by one or take the lot as a single ZIP.

Do these work on an iPhone or an Android phone?

Yes. Anything with a current version of Chrome, Safari, Firefox or Edge will run them, phones and tablets included, with nothing to install. HEIC photos are the one thing to be patient with: the decoder loads the first time you use it, so photo number one can take a few seconds while the rest are quick.

What happens to the metadata in my photos?

Most converters here drop EXIF — camera model, timestamps, GPS coordinates — when they write the new file, so a photo you share is not carrying your location with it. Each tool states what it keeps on its own page, above the dropzone.

Can I request a tool that isn't here yet?

Yes, there is a form at the bottom of this page. Say what format you have, what you need it to become, and what usually goes wrong when you try. Requests get read every Monday and the most-asked one gets built first.

Do my files get uploaded to a server?

For nearly every tool here, no. The work happens in your browser, on your own device, and the file is never sent anywhere. The few jobs that genuinely cannot run locally say so clearly, above the controls, before you begin. The rest you can check yourself: open a tool, go offline, and it still works.

Is there a limit on file size or how many I can do?

There is no cap imposed here. The real ceiling is your device's memory, since that is where the work happens: a phone handles a modest batch, a laptop handles a large one. If a very big job stalls, split it in half and run it twice. There is no per-day limit and no paid tier that lifts one.

What do I need to use these — an app, an account?

Neither. Anything with a current version of Chrome, Safari, Firefox or Edge runs them, phones and tablets included, with nothing to install and nobody to sign up as. You open a page and use it.

Why is everything free? What's the catch?

Because the tools run on your device, there is no server doing the work and so no cost to recover from you. That removes the usual reason to charge, gate features or show ads mid-task. There is no catch to find — the trade is simply that the heavy lifting happens on your hardware instead of ours.

Contribute

Missing something, or found something broken?

Request a tool

The format you have, the format you need, and what usually goes wrong. Read every Monday; most-asked gets built first.

    heic → jpg, keep dates split pdf by bookmark webp → png, batch

    Report a bug

    Name the tool and the file type, then what you expected. It goes straight to whoever wrote that tool.

      or open the full form at /report