Tools that finish the job.
A chat window can explain a contrast ratio. It cannot hand you a typeset PDF, flatten a forty-thousand-row export, or show you your own chart through deuteranopia. These do — entirely in your browser.
- 7 tools
- Free
- Nothing uploaded
- No account
- 01Typeset a document
Markdown to PDF
Paste Markdown, get a properly typeset PDF — set on a real measure, with real hierarchy, not a browser default.
Bring your own AIClient-sideFree - 02Audit a whole palette
Contrast Grid
Every foreground against every background at once, scored to WCAG 2.2 AA and AAA — not one pair at a time.
Client-sideFree - 03Size a frame
Aspect Ratio & Frame
Solve any missing dimension, and check it against current delivery specs for social, video and print.
Client-sideFree - 04Convert structured data
JSON ⇄ CSV
Convert in both directions, flatten nested objects, and download the file — with your data never leaving the browser.
Bring your own AIClient-sideFree - 05See it as others do
Colour Vision Simulator
Simulate the eight forms of colour vision deficiency on your own screenshots, palettes and charts.
Client-sideFree - 06Build a scale
Type Scale
A fluid, clamp-based type scale with a live specimen, a measure check, and CSS you can paste straight into a token file.
Client-sideFree - 07Budget a render
Bitrate & File Size
Solve bitrate, duration or file size, with target bitrates for current codecs and platforms.
Client-sideFree
Built for the jobs a chat answer leaves unfinished.
We did not pick these by search volume alone. Each one leans on at least two things a language model genuinely cannot do.
- Hand you a file
- No PDF, PNG, ICO or ZIP comes out of a chat window. Here the file is the deliverable.
- Process real volume
- A forty-thousand-row export does not fit in a context window, and a model may silently drop rows.
- Show you the result
- Type specimens, colour simulations and frame previews are judged by looking, not by reading a description.
- Guarantee the arithmetic
- Relative luminance, clamp slopes and bitrate budgets are right or wrong — not approximately right.
- Keep the data private
- Everything runs locally. Load the page, disconnect, and it still works.
- Stay current
- Platform specs and codec targets drift. Ours carry a verification date; a training cutoff does not.
We hand you the prompt, not an invoice.
Several of these tools have a fuzzy half — turning a messy PDF table into structured data, or drafting a document before it is typeset. That half is genuinely better done by a language model.
So we give you the prompt rather than reselling you a model. You run it in whatever assistant you already pay for, bring the structured result back, and the tool does the deterministic half: validate, compute, render, export.
No API key. No per-use cost. No account. And no situation where our margin depends on you sending your client’s data through our server.
Search demand set the shortlist; the list above decided what survived it. The figures are US monthly search volume and Ubersuggest SEO difficulty, sampled September 2026.
| Tool | Primary keyword | Volume | Difficulty |
|---|---|---|---|
| Markdown to PDF | markdown to pdf | 14,800 | 40 |
| Contrast Grid | color contrast checker | 12,100 | 66 |
| Aspect Ratio & Frame | aspect ratio calculator | 14,800 | 30 |
| JSON ⇄ CSV | json to csv | 6,600 | 41 |
| Colour Vision Simulator | color blindness simulator | 3,600 | 43 |
| Type Scale | type scale generator | 110 | 28 |
| Bitrate & File Size | video bitrate calculator | 260 | 19 |
Tools find the symptom. An audit finds the cause.
A focused audit reviews what you have shipped against all ten disciplines and returns a prioritised plan. It is the cheapest thing we sell, and it regularly concludes you do not need the project you came for.