S
Solvin
Tool Directory

Free online developer and app store tools

Solvin Tools provides free online tools for PDF merge, split, compression, watermarking, page numbering, metadata cleanup, Markdown to PDF, Markdown table formatting, CSV to Markdown tables, word counting, keyword density, keyword trend ranking, social preview checks, SEO metadata, robots.txt, sitemap.xml, JSON-LD schema, UTM links, keyword cleanup, XML formatting, CSV conversion, regex testing, cron explanation, timestamps, UUIDs, passwords, hashes, diffs, JSON Schema, SQL inserts, images to PDF, JSON formatting, config conversion, JWT decoding, URL parsing, app store screenshots, Apple Watch screenshots, Google Play feature graphics, favicon generation, image conversion, image compression, image resizing, Base64 images, branded QR codes, color palettes, screenshot annotation, and sequence image composition.

38
tools
6
categories
38
Tool library
Browse by workflow

Workflow

Choose a category and the tool list narrows instantly.

Developer Utilities

10 tools

JSON, XML, CSV, config, JWT, URL, and text cleanup tools.

#01
Developer Utilities

Text Reflower

Fix PDF line breaks & formatting

Open tool
#02
Developer Utilities

JSON Formatter

Format and validate JSON

Open tool
#03
Developer Utilities

Config Converter

Convert JSON, YAML, TOML, and ENV

Open tool
#04
Developer Utilities

JWT Decoder

Decode JWTs and inspect API tokens

Open tool
#05
Developer Utilities

URL Parser

Parse URLs and compare query params

Open tool
#06
Developer Utilities

Text Codec Toolkit

Encode, decode, escape, and hash text

Open tool
#07
Developer Utilities

XML Toolkit

Format, minify, validate, and convert XML

Open tool
#08
Developer Utilities

CSV Toolkit

Convert, clean, sort, and export CSV data

Open tool
#09
Developer Utilities

sub2api CRS JSON Converter

Convert sub2api and CRS account JSON

Open tool
#10
Developer Utilities

Developer Toolkit

Regex, cron, timestamp, UUID, hash, diff, CSV, and SQL tools

Open tool

Image & Design

14 tools

Image conversion, compression, QR codes, palettes, annotation, and sequence graphics.

#01
Image & Design

Image QR Code Generator

Create scan-safe QR codes with a logo or image in the center

Open tool
#02
Image & Design

Color Extractor & Brand Palette Generator

Extract colors and generate brand palettes

Open tool
#03
Image & Design 9 subtools

Image Tools Matrix

Convert, compress, resize, and encode images in one place

9 Included tools
#04
Image & Design

Screenshot Annotator

Mark screenshots with arrows, boxes, text, and steps

Open tool
#05
Image & Design

Sequence Image Composer

Combine multiple images into one ordered process graphic

Open tool

SEO & Growth

5 tools

Metadata, sitemap, robots, schema, social previews, and keyword utilities.

#01
SEO & Growth

SEO Toolkit

Generate meta, robots, sitemap, schema, UTM, and keyword output

Open tool
#02
SEO & Growth

Word Counter

Count words, reading time, and keyword density

Open tool
#03
SEO & Growth

Social Preview Checker

Preview Open Graph and Twitter cards

Open tool
#04
SEO & Growth

Schema Markup Generator

Generate JSON-LD schema markup

Open tool
#05
SEO & Growth

Keyword Trends Ranker

Rank Google Trends CSV exports and keyword tables

Open tool

PDF & Documents

3 tools

Merge, split, extract, and create practical document files.

#01
PDF & Documents

PDF Tools Matrix

Merge, split, compress, sign, convert, resize, and organize PDFs

Open tool
#02
PDF & Documents

Markdown to PDF

Convert Markdown tables to print-ready PDF

Open tool
#03
PDF & Documents

Markdown Utilities

Preview, format tables, convert HTML, render Mermaid, build slides and TOC

Open tool

Launch Assets

5 tools

Icons, favicons, store screenshots, and Google Play assets.

#01
Launch Assets

App Resource Cropper

Generate App Store assets

Open tool
#02
Launch Assets

Favicon & PWA Icon Generator

Generate favicons and PWA icons

Open tool
#03
Launch Assets

Feature Graphic Generator

Generate 1024x500 Google Play feature graphics online

Open tool
#04
Launch Assets

Screenshot Set Generator

Generate multi-device app store screenshot sets

Open tool
#05
Launch Assets

Apple Watch Screenshot Set Generator

Generate App Store screenshots for Apple Watch

Open tool

Personal Reset

1 tools

Private browser-local habit reset and tracking tools.

#01
Personal Reset

UrgeKit

Craving SOS and trigger tracker for habit resets

Open tool