# hYYa ink: PDF & Markdown — JSON, CSV & YAML editor

> Edit and view various document formats, including PDF, with AI capabilities. (iPhone/iPad app by Hassaan Abdeen.)

- Source: https://appshunter.io/ios/app/hyya-ink-pdf-and-markdown/id6786209046 (this page in markdown: same URL + `.md`)
- Developer: [Hassaan Abdeen](https://appshunter.io/developer/1866789892)
- Category: Developer Tools, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 16 MB
- Languages: Russian, Bangla, Gujarati, Hindi, Odia, Slovenian, Urdu, Vietnamese, American English, Arabic and 34 more
- Released: 2026-07-06
- Data updated: 2026-10-19
- Monetization: freemium

## What is hYYa ink?

Stop reading syntax. Start reading documents.

hYYa ink opens the files developers, students and academics work with every day, and turns them into beautiful, readable, editable documents instead of walls of raw text. On Mac, iPhone, iPad and Apple Vision Pro.

ONE APP, MANY FORMATS

• Markdown — rendered live, with a formatting toolbar (bold, headings, lists, quotes, links)

• JSON, YAML, TOML — collapsible trees, with JSON values editable right in the tree

• CSV & TSV — a real table, editable cell by cell

• Mermaid & Graphviz — diagrams drawn instantly, fully offline

• LaTeX — math typeset beautifully

• Jupyter notebooks — cells, code and text outputs, cleanly laid out

• AsciiDoc, Org-mode, XML, diff, logs — readable at last

EDIT, DON'T JUST VIEW

Edit the source and watch the document update. On Mac, iPad and Apple Vision Pro, a split view shows source and preview side by side. Change JSON values and CSV cells right in the preview, and hYYa ink writes the file back in valid syntax for you.

Start a new document in any format: tap the format label at the top of a document, then choose Graphviz, Mermaid, LaTeX, JSON and more.

PDF — READ, SEARCH, ORGANISE, SIGN

Open any PDF as a real document. Find any word with a live match count. Browse by page thumbnail or by the document's own contents. Is the file password-protected? hYYa ink asks for the password and opens it.

To add text, tap the exact spot on the page and type, then drag the text into place. Draw your signature by hand, then place, resize and rotate it. Mark up a page freehand with pen, pencil and marker, or highlight, underline and strike through the text you select.

Make a scanned PDF searchable: text recognition adds a text layer to scanned pages, so you can search them. It runs on your device, and your pages are never sent anywhere.

You can also reorganise pages, protect a PDF with a password, compress it or add a watermark. Each of these, like making a PDF searchable, writes a NEW file and leaves the PDF you opened untouched. And you can compare two PDFs to see which pages differ.

BRING YOUR OWN AI

Use your own key with an AI service: OpenRouter, Groq, Together AI, or another service that works the same way. The AI actions work on every format except PDF: "Explain", "Summarize", "Reformat" and "Fix errors", plus "Make diagram", which writes Mermaid code for a diagram of your document. Your key stays on your device. Only the open document's text is sent, and only when you use an AI action. Every AI result says it was written by AI and names the model.

PRIVATE BY DESIGN. BEAUTIFUL BY DESIGN.

No accounts. No tracking. No data collection. Documents open and display on your device without an internet connection, and they never leave your device unless you ask.

FREE TO READ, PRO TO EDIT

Reading and previewing every format hYYa ink opens is free forever, and so are the "Export to PDF" and "Print" commands. On PDFs, search, the page and contents browser, and opening password-protected files are free too. A free 7-day trial unlocks everything. After that, a single one-time purchase unlocks editing and the AI features permanently, on Mac, iPhone, iPad and Apple Vision Pro.

On Mac, select a file in Finder and press Space: Quick Look shows CSV and TSV as a table, JSON neatly indented, and Markdown, YAML and other text files as plain, readable text.

From hYYa — more than apps. Companions you can trust.

## Key features

- Live Markdown rendering with formatting toolbar
- Editable JSON, YAML, TOML trees
- Interactive CSV/TSV tables
- Offline diagram generation (Mermaid, Graphviz)
- Beautifully typeset LaTeX math
- PDF editing, signing, and search
- On-device AI actions for text manipulation

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| hYYa ink Pro | $19.99 | one-time |


## Is hYYa ink safe?

Not enough ratings yet to assess hYYa ink.

## Is hYYa ink legit?

hYYa ink: PDF & Markdown appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for hYYa ink is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about hYYa ink

### What formats can hYYa ink edit?

hYYa ink can edit Markdown, JSON, YAML, TOML, CSV, TSV, AsciiDoc, Org-mode, XML, diff, logs, and Jupyter notebooks. PDF editing is also a core feature.

### Is hYYa ink free to use?

Reading and previewing all supported formats, exporting to PDF, and printing are free. Advanced editing features for PDFs and other formats require a Pro upgrade.

### Does hYYa ink support AI features?

Yes, hYYa ink allows you to bring your own AI key from services like OpenRouter or Groq. AI actions like 'Explain', 'Summarize', 'Reformat', and 'Fix errors' are available for text-based formats.

### How does hYYa ink handle privacy?

hYYa ink is designed with privacy in mind. It has no accounts, no tracking, and no data collection. Documents are processed on your device and never leave unless you explicitly ask.

### Can I edit PDFs with hYYa ink?

Yes, you can read, search, organize, and sign PDFs. You can also add text, draw signatures, mark up pages, make scanned PDFs searchable with on-device text recognition, and compare PDFs.

### What devices does hYYa ink support?

hYYa ink is available on Mac, iPhone, iPad, and Apple Vision Pro.

### How often is hYYa ink updated?

The latest version, 1.5.0, was released on October 18, 2026, indicating regular updates to improve functionality and add features.

### Can I edit JSON values directly in the preview?

Yes, for JSON, YAML, and TOML, you can edit values directly within the collapsible tree view, and hYYa ink will write the changes back to the source file with valid syntax.

## Version history (last 5 releases)

### 1.5.0 — 2026-10-18

This release contains general bug fixes and stability improvements.

### 1.4.14 — 2026-10-17

This release contains general bug fixes and stability improvements.

### 1.4.13 — 2026-10-15

This release contains general bug fixes and stability improvements.

### 1.4.12 — 2026-10-13

hYYa ink's menus, buttons and settings are now translated into 46 languages.
This release contains general bug fixes and stability improvements.

### 1.4.11 — 2026-10-10

Tap the format label at the top of a document to change its format: Graphviz, Mermaid, LaTeX, JSON and more.
This release contains general bug fixes and stability improvements.

## Apps similar to hYYa ink

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Solar2D Studio - CoronaSDK](https://appshunter.io/ios/app/solar2d-studio-coronasdk/id6498889447) | 5.0 (1) | $9.99 | Developer Tools |
| [DevStack Tools](https://appshunter.io/ios/app/devstack-tools/id6773667344) | — | Free | Developer Tools |
| [Simple Sequence Diagram AI](https://appshunter.io/ios/app/simple-sequence-diagram-ai/id6711357061) | — | Free | Developer Tools |
| [Dev Tool box - Developer Tools](https://appshunter.io/ios/app/dev-tool-box-developer-tools/id6749840624) | — | Free | Developer Tools |
| [Thinger.io](https://appshunter.io/ios/app/thingerio/id6503300549) | — | Free | Developer Tools |
| [ConnectID RP Sample](https://appshunter.io/ios/app/connectid-rp-sample/id6477849677) | — | Free | Developer Tools |

## More apps by Hassaan Abdeen

- [hYYa Prayer Pal](https://appshunter.io/ios/app/hyya-prayer-pal/id6757415305)
- [hYYa Subscriptions Tracker](https://appshunter.io/ios/app/hyya-subscriptions-tracker/id6760548018)
- [hYYa ai](https://appshunter.io/ios/app/hyya-ai/id6767114813)
- [hYYa Encrypted Folder](https://appshunter.io/ios/app/hyya-encrypted-folder/id6786135330)
- [hYYa Encrypted Notes](https://appshunter.io/ios/app/hyya-encrypted-notes/id6792328099)

All apps by Hassaan Abdeen: https://appshunter.io/developer/1866789892

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-19.*