Free tools
Small utilities we built because we needed them. They run entirely in your browser — no signup, no email capture, no ads, and nothing you type is sent anywhere.
All 31 tools, callable by your AI agent
A free hosted MCP server exposing every tool on this page. Works with Claude Code, Cursor and Claude Desktop. No API key, no account.
https://goaichat.app/mcp-tools/mcp
HEIC to JPG & PNG
Convert iPhone photos in batch with a quality slider. The decoder runs on your machine — unlike every other free converter, the photos are never uploaded.
iPhone users · pairs with GO AI ChatFavicon & web manifest generator
One image in; a real multi-size .ico, the Apple touch icon, manifest PNGs, site.webmanifest and the HTML block out — with the Android maskable crop previewed.
Web devs · pairs with NeurobaseWCAG contrast checker
The ratio, a verdict at every size WCAG grades separately, and the nearest passing colour that keeps your hue. APCA shown alongside, marked as not yet the standard.
Designers · pairs with GO AI ChatBMI & Navy body fat
BMI cannot tell muscle from fat; the Navy tape method can, roughly. Runs both, says where each one misleads, and hands the result to the TDEE calculator.
Nutrition · pairs with GO AI CalorieTDEE & macro calculator
Runs Mifflin-St Jeor, Harris-Benedict and Katch-McArdle side by side and shows the working — so you can see why every calculator gives you a different number.
Nutrition · pairs with GO AI CalorieAI token counter & cost estimator
Paste text to estimate tokens, check whether it fits a context window, and work out cost at your own API rates. Honest about where the estimate is weak.
Developers · pairs with NeurobaseWhich AI model should I use?
Pick your task, get a recommendation and the reasoning behind it. GPT-5, Gemini, Grok 4, Claude, DeepSeek and Kimi, judged from daily side-by-side use.
AI users · pairs with GO AI ChatOKLCH converter and palettes
Convert, build even ramps, and see out-of-gamut colours mapped by reducing chroma rather than clipping channels.
Front-end developersBPM tapper and delay times
Tap out the tempo, then read every delay and modulation time for it — straight, dotted and triplet — instead of working them out again.
ProducersWindow light estimator
Whether your window really gives bright indirect light, worked out from its direction, your hemisphere and where the plant stands.
Plant ownersGoal-date calculator
When you will actually reach a goal weight, with the curve that flattens rather than the straight line everyone else draws.
Anyone tracking a deficitLive Photo to GIF
Trim the video half of a Live Photo and convert it, with a palette built from your own frames rather than a fixed one.
iPhone ownersBatch resizer with real presets
App Store screenshots, Open Graph cards, favicon sets and Android densities — not small, medium and large.
Developers and marketersImage compressor with a quality curve
The real size-against-quality curve for your own image, with a draggable before-and-after divider instead of a preset.
Anyone with an imageApp privacy label builder
From the SDKs in your binary to the data types Apple asks you to declare, with the tracking question called out separately.
iOS developersProvisioning profile inspector
Expiry, team, entitlements and device list from a .mobileprovision — read in your browser, because it names your devices.
iOS developersApp Store link builder
Correct storefront URLs with campaign attribution, plus a QR code encoded on the page rather than fetched from a generator.
ASO and marketingApp Store net revenue calculator
What you actually receive after the tax inside your price and Apple's cut. Standard, Small Business and year-two subscription rates.
Indie developersPlant watering calendar
Pick your plants, pot and light, and download a real .ics with recurring reminders to check the soil. Winter is accounted for.
Plant ownersLocalizable.strings checker
Missing keys, duplicate values under different keys, and lines that will not parse — across every locale file at once.
iOS developersApp icon generator
One 1024 image in, every iOS and Android size out — with a Contents.json Xcode accepts and the dark and tinted variants.
iOS and Android developersEXIF viewer and stripper
See the location, time, device and serial numbers hidden in a photo, then remove them without re-encoding the picture.
Anyone sharing photosRecipe scaler with cups to grams
Scale by servings and convert volume to weight per ingredient. A cup of flour is 125 g, a cup of honey is 339 g — most converters use one figure for both.
Home cooksApp Store screenshot generator
Frame a simulator screenshot, add a headline, export every size App Store Connect accepts. Nothing is uploaded.
iOS developersCSS clamp() calculator
Fluid type between two viewport widths, output in rem so it respects the reader's browser font size. Live preview and a matched type scale.
Front-end developersApp Store keyword field optimizer
Find what is wasting space in your 100-byte keyword field, and count every metadata limit in bytes rather than characters.
ASO & app developersiPhone & iPad screen sizes
Points, pixels, scale, safe-area insets and corner radius for every current device, in one filterable table.
iOS developersApp Store storefront checker
Search any country's App Store, or compare one app across fifteen markets at once — localized titles, prices, ratings, availability.
ASO & app developers · pairs with NeurobaseWhy these are free
We build AI apps, and each of these tools solves a problem next to one of them: working out a calorie target, sizing a document for a model, choosing between models, checking how a listing looks in another country. If a tool is useful you might look at the app it relates to — that's the whole business model, and there's no step where we ask for your email first.
Everything is client-side. There's no backend on this site, so there's nowhere for your inputs to go even if we wanted them.
Something wrong, or a tool you'd want? support@goaichats.com.