Indian languages, PDFs & system design — sorted

Names by nakshatra, rashi, theme, rhyme & numerology

Find a name by your baby’s nakshatra or rashi (with the traditional lucky starting sounds), by first letter, meaning, theme, or rhyming sound — across Telugu, Tamil, Kannada, Hindi and Bengali. Filter by Chaldean numerology number, save a shortlist to share with your partner, combine two names into a blend, or match a sibling’s name. Every name comes with its meaning, its script, and how to say it. Free.

Add & edit Indic text on any PDF

Upload a PDF and type Telugu, Tamil, Kannada, Hindi or Bengali text anywhere on the page — with proper matras and conjuncts that ordinary PDF editors mangle. Download the edited PDF.

Kruti Dev, TSCII, Bijoy & 7 more ↔ Unicode

Paste text typed in an old non-Unicode font — Kruti Dev, TSCII, Bijoy, AnmolLipi, Nudi/Baraha, Bamini, Vanavil, Chanakya, Anu — and convert it to clean, copy-anywhere Unicode, or convert back to the legacy font for offices that still require it. Also converts a whole .docx file, formatting intact.

Name calligraphy, font styles & occasion card maker

Type a name (or two, for a couple) and see it beautifully rendered in Telugu, Tamil, Kannada, Devanagari or Bengali script. Choose a typeface, text effect, custom colours or an occasion theme — Diwali, wedding, birthday, baby announcement — plus card, Instagram post, story or profile-picture sizes, a transparent background, or a monogram. Download a high-resolution image.

Decorate any name — copy, paste, done

Type a name or word — in Tamil, Telugu, Kannada, Hindi, Bengali or plain Roman letters — and get it back wrapped in 15+ decorative styles: sparkles, temple-gate brackets, hearts, florals and more. No download, no watermark — tap Copy and paste straight into your Instagram bio or WhatsApp status.

Combine multiple PDFs into one

Upload several PDFs and combine them into a single file, in the order you choose. Everything happens in your browser — files are never uploaded anywhere.

Break one PDF into page ranges

Upload a PDF and split it into separate files by page range — e.g. pages 1-3, 4-6 — and download them individually or as a zip.

Fix sideways or upside-down pages

Rotate every page, or just the ones you pick, by 90°, 180° or 270° — then download the fixed PDF.

Reorder, delete or extract pages

Drag pages into a new order, remove the ones you don’t need, or pull out a subset — then download the reorganized PDF.

Number every page automatically

Add page numbers to a PDF — choose the starting number and whether they sit bottom-centre or bottom-right.

Stamp text across every page

Add a repeating diagonal text watermark (e.g. "Confidential" or "Draft") across every page of a PDF.

Trim margins on every page

Trim the margins of every page in a PDF by a percentage from each edge — useful for removing scan borders.

Turn photos or scans into a PDF

Upload one or more images (JPG or PNG) and combine them into a single PDF, one image per page.

Export every page as an image

Convert every page of a PDF into a high-resolution JPG image, downloaded individually or as a zip.

Shrink a PDF’s file size

Reduce a PDF’s file size by re-rendering each page at a lower quality. Best for scanned or image-heavy PDFs — note that this flattens pages to images, so text is no longer selectable afterwards.

Highlight text and add sticky notes

Drag to highlight text and drop sticky notes anywhere on a PDF, then download the annotated file.

Draw or type a signature and place it

Draw your signature (or type it in a cursive style), then drag it onto any page and download the signed PDF. For your own signature only — this does not send documents for signature requests.

Permanently black out sensitive content

Draw black boxes over sensitive text or images, then export — the page is flattened to an image so the covered content is genuinely gone, not just hidden underneath.

See what changed between two PDFs

Upload two versions of a document and see every word that was added or removed, page by page.

Turn a scanned PDF into selectable text

Run on-device text recognition over a scanned or image-only PDF and get back copyable, searchable text — no file is ever uploaded to a server.

Complete an existing fillable PDF form

Upload a PDF that already has form fields and fill them in directly in your browser, then download the completed form.

Turn any PDF into a fillable form

Draw text fields and checkboxes onto any PDF to turn it into a real, fillable AcroForm — ready to send out and fill in any PDF reader.

Extract text into an editable .docx

Best-effort conversion: pulls the text out of a PDF into a Word document you can edit. Complex layouts, tables and images are not preserved — for simple, mostly-text PDFs this works well.

Turn a .docx into a PDF

Best-effort conversion: renders a Word document’s content and turns it into a PDF, right in your browser. Complex formatting may shift slightly.

Pull tabular text into a spreadsheet

Best-effort conversion: reconstructs rows and columns from a PDF’s text into an .xlsx spreadsheet. Works best on simple tables — complex layouts may need manual cleanup.

Turn a spreadsheet into a PDF

Renders a spreadsheet’s sheets as PDF pages, right in your browser.

One slide per page

Turn each page of a PDF into a slide image in a .pptx file — a quick way to get a PDF into an editable-as-slides format.

Extract text as clean Markdown

Best-effort conversion: pulls a PDF’s text into Markdown with simple heading detection. Great for feeding a PDF into notes, wikis, or an LLM.

Turn HTML into a paginated PDF

Paste an HTML snippet and turn it into a paginated PDF, right in your browser.

Back-of-envelope system design estimation

Enter monthly active users, requests per user and payload size to get average/peak QPS, bandwidth, storage (with replication), cache size and server count — the full back-of-envelope estimate for a system design interview. Free.

Draw components, connect them, pick real tech per box

Drag components (load balancer, cache, database, queue, CDN…) onto a canvas, connect them with arrows, and pick a real technology for each from a curated shortlist. Load a starter example, export as PNG, or copy as Mermaid to paste into your docs. Free.

Chain vs. redundancy math, downtime per year/month/day

Turn "99.95%" into an actual downtime figure, chain component availabilities to find your system's weakest link, and see how many redundant replicas it takes to hit five nines. Free.

Shard count from data size + write QPS, hash vs. range

Enter total data size, max data per shard, and write QPS to get the shard count your system actually needs — sized by whichever limit hits first. Plus a hash-vs-range-vs-directory partitioning strategy picker. Free.

Split a p99 SLA across network, cache, DB and compute hops

Pick a request-path scenario (cache hit, cross-region read, replicated write…), tune each hop's latency, and see exactly where a p99 SLA target is being spent — or blown. Free.

Bit array size, hash count & false-positive rate

Enter item count and target false-positive rate to get the optimal bit array size and hash function count — or flip it around and see the false-positive rate a fixed memory budget gets you. Free.