Comparison

JSON Master vs Sign PDF

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

JSON Master

This offline iOS tool formats, views, validates, and converts JSON data. It supports large files and offers privacy-safe, local processing for developers needing to debug API responses or transform data formats.

Highlights
  • Offline JSON formatting and beautifying
  • Tree and text view for JSON visualization
  • Instant JSON syntax validation
  • JSON to CSV, XML, Excel conversion
  • Large file support
  • Import from clipboard and files
Features
Read full description

JSON Master is a professional JSON Formatter / Viewer / Converter for developers (offline iOS tool). Three key points upfront: 100% offline processing, privacy-safe, large file support — your data is never uploaded to any server. Core Features (Developer Favorites): JSON Formatter & Beautifier: One-click format/beautify/minify, with syntax highlighting support. JSON Viewer: Tree View / Text views for clear structure visualization. JSON Validator: Instant syntax error detection (with line numbers) for quick API response debugging. Fast Converter: Bidirectional JSON ↔ CSV / XML / Excel (.xlsx) conversion. Large File Support: Smoothly open and edit large files. Import Anywhere: Import from Clipboard / Files for debugging anytime. Why Choose JSON Master? • Privacy First: All formatting, validation, and conversion happen locally on your device. • Focused & Distraction-Free: Clean interface with no redundant steps, perfect for quick data inspection and fixing. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://legal.rkvpxdr.com/privacy.html

About

Sign PDF

Features
Read full description

Need to sign a lease, contract, or NDA right now? Sign PDF turns your iPhone into a document signer: import any PDF, add your signature in seconds, and send back a clean, professional copy. Your first signed document is completely free. No printer. No scanner. No creating an account. HOW IT WORKS 1. Import any PDF from Files, email, or another app 2. Create your signature draw it with your finger or Apple Pencil, type your name in an elegant script, or import a photo of your real signature 3. Drag it exactly where it belongs, resize it to fit, and add a date stamp if you need one 4. Export and share a clean signed copy anywhere WHY PEOPLE CHOOSE SIGN PDF • THREE WAYS TO SIGN Draw naturally with pressure-sensitive Apple Pencil support, type your name in a beautiful script font, or import an image of your existing signature. • PIXEL-PERFECT PLACEMENT Drag, resize, and position your signature precisely on any page of the document. Add an automatic date stamp with one tap. • YOUR ORIGINAL IS ALWAYS SAFE Sign PDF creates a new signed copy every time. Your source document is never modified. • WORKS WITH MULTI-PAGE DOCUMENTS Navigate any PDF and sign exactly the pages that need it: leases, contracts, NDAs, permission slips, invoices, offer letters. • SHARE ANYWHERE Send your signed document straight back through Mail, Messages, WhatsApp, or save it to Files and iCloud. • PRIVATE BY DESIGN Your documents are processed on your device. No account required. PERFECT FOR Renters signing leases • Freelancers returning contracts • Parents signing school forms • Job seekers signing offer letters • Small business owners closing deals on the go FREE & PREMIUM Your first signed document is free experience the full app before you decide. Go Premium for unlimited signing and exporting. Download Sign PDF and send that document back in the next two minutes. •⁠ ⁠Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ •⁠ ⁠Privacy Policy: https://docs.google.com/document/d/1Y4Mhhyeza2RJlpv2dAGQ2yM7A4Lisr6Y8B_jnYcvg-c/edit?usp=sharing

Screenshots

JSON Master3 screens
Sign PDF4 screens

Verdict

The call

The clearest difference is ads: Sign PDF at none against JSON Master's shown. JSON Master's advantage is update cadence (every 9 days vs monthly) and iOS requirement (15.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. JSON Master sells 3 in-app purchases, starting at $2.99 per 7 days and Sign PDF sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

JSON Master ships an update every 9 days, Sign PDF monthly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
JSON Master versus Sign PDF: the parameters behind the verdict, then further details
ParameterJSON MasterSign PDF
PriceFreeFree
Rating4.6 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 9 days — betterMonthly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size41 MB15 MB
Age rating4+4+
DeveloperTianjin Illuso Information Technology Co., Ltd.RUEBEN ANSOLIWEN AKANKOBATENG

In-app purchases

3 purchases

JSON Master

Subscriptions2
  • JSON Master Pro (Weekly)3 Days trial$2.997 Days
  • Pro (Yearly)$14.991 Year
One-time1
  • JSON Master Pro Lifetime$17.99
3 purchases

Sign PDF

Subscriptions2
  • All access monthly$4.991 Month
  • All access yearly$24.991 Year
One-time1
  • All access Lifetime$49.99

Questions

Is JSON Master free?
JSON Master is free to download, with in-app purchases available.
Is Sign PDF free?
Sign PDF is free to download, with in-app purchases available.
Do JSON Master or Sign PDF have ads?
JSON Master shows ads; Sign PDF does not.
Which is updated more often, JSON Master or Sign PDF?
JSON Master ships an update every 9 days, and Sign PDF monthly. Most recently, JSON Master was updated on October 24, 2026 and Sign PDF on October 28, 2026.

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