diff --git a/web/src/lib/components/ParamForm.svelte b/web/src/lib/components/ParamForm.svelte
index 65b2491..9f8027a 100644
--- a/web/src/lib/components/ParamForm.svelte
+++ b/web/src/lib/components/ParamForm.svelte
@@ -2,6 +2,7 @@
 	import CheckboxField from './ui/CheckboxField.svelte';
 	import ColorField from './ui/ColorField.svelte';
 	import SelectField from './ui/SelectField.svelte';
+	import SliderField from './ui/SliderField.svelte';
 	import TextField from './ui/TextField.svelte';
 	import type { ParamDef } from '$lib/registry';
 
@@ -26,6 +27,16 @@
 			step={param.step}
 			bind:value={values[param.id]}
 		/>
+	{:else if param.type === 'slider'}
+		<SliderField
+			id={param.id}
+			label={param.label}
+			min={param.min}
+			max={param.max}
+			step={param.step}
+			default={param.default}
+			bind:value={values[param.id]}
+		/>
 	{:else if param.type === 'select'}
 		<SelectField
 			id={param.id}
diff --git a/web/src/lib/components/ui/SliderField.svelte b/web/src/lib/components/ui/SliderField.svelte
index 9b14b02..dd65ed3 100644
--- a/web/src/lib/components/ui/SliderField.svelte
+++ b/web/src/lib/components/ui/SliderField.svelte
@@ -8,15 +8,52 @@
 		min?: number;
 		max?: number;
 		step?: number;
+		default?: number;
 		hint?: string;
 	}
 
-	let { id, label, value = $bindable(0), min, max, step, hint }: Props = $props();
+	let {
+		id,
+		label,
+		value = $bindable(0),
+		min,
+		max,
+		step,
+		default: defaultValue,
+		hint
+	}: Props = $props();
+
+	function decrement() {
+		if (min !== undefined && value <= min) return;
+		value = Math.max(min ?? -Infinity, value - (step ?? 1));
+	}
+
+	function increment() {
+		if (max !== undefined && value >= max) return;
+		value = Math.min(max ?? Infinity, value + (step ?? 1));
+	}
+
+	function reset() {
+		if (defaultValue !== undefined) value = defaultValue;
+	}
+
+	const resetDisabled = $derived(defaultValue === undefined || value === defaultValue);
 </script>
 
 <Field {id} {label} {hint}>
 	<div class="row">
+		<button type="button" class="step" aria-label="Уменьшить" onclick={decrement}>−</button>
 		<input id={id} type="range" min={min} max={max} step={step} bind:value />
+		<button type="button" class="step" aria-label="Увеличить" onclick={increment}>+</button>
+		<button
+			type="button"
+			class="step"
+			aria-label="Сбросить"
+			disabled={resetDisabled}
+			onclick={reset}
+		>
+			↺
+		</button>
 		<output>{value}</output>
 	</div>
 </Field>
@@ -25,16 +62,48 @@
 	.row {
 		display: flex;
 		align-items: center;
-		gap: var(--space-2);
+		gap: var(--space-1);
 		max-width: var(--control-max-width);
 	}
 
 	input[type='range'] {
 		flex: 1;
+		min-width: 0;
 		accent-color: var(--accent);
 	}
 
+	.step {
+		flex: none;
+		width: 1.7rem;
+		height: 1.7rem;
+		display: inline-flex;
+		align-items: center;
+		justify-content: center;
+		padding: 0;
+		border: 1px solid var(--border);
+		border-radius: var(--radius-s);
+		background: var(--surface);
+		color: var(--text);
+		font-size: 0.9rem;
+		line-height: 1;
+		cursor: pointer;
+		transition:
+			border-color var(--transition-fast),
+			color var(--transition-fast);
+	}
+
+	.step:hover:not(:disabled) {
+		border-color: var(--accent);
+		color: var(--accent);
+	}
+
+	.step:disabled {
+		opacity: 0.45;
+		cursor: not-allowed;
+	}
+
 	output {
+		flex: none;
 		min-width: 3ch;
 		text-align: right;
 		font-family: var(--font-mono);
diff --git a/web/src/lib/core/color.test.ts b/web/src/lib/core/color.test.ts
index 7714499..5a56913 100644
--- a/web/src/lib/core/color.test.ts
+++ b/web/src/lib/core/color.test.ts
@@ -1,7 +1,18 @@
 import { describe, expect, it } from 'vitest';
-import { brightnessContrast, grayscale, invert } from './color';
+import { brightnessContrast, grayscale, invert, rgbToHex } from './color';
 import { makeImage } from './test-helpers';
 
+describe('rgbToHex', () => {
+	it('форматирует базовые цвета', () => {
+		expect(rgbToHex(255, 0, 0)).toBe('#ff0000');
+		expect(rgbToHex(1, 2, 3)).toBe('#010203');
+	});
+
+	it('округляет дробные значения и клампит диапазон', () => {
+		expect(rgbToHex(127.6, -5, 300)).toBe('#8000ff');
+	});
+});
+
 describe('grayscale', () => {
 	it('считает luma по весам BT.601 с округлением', () => {
 		const out = grayscale(
diff --git a/web/src/lib/core/color.ts b/web/src/lib/core/color.ts
index 188185f..d69cf33 100644
--- a/web/src/lib/core/color.ts
+++ b/web/src/lib/core/color.ts
@@ -42,6 +42,11 @@ export function brightnessContrast(
 	return out;
 }
 
+export function rgbToHex(r: number, g: number, b: number): string {
+	const byte = (v: number) => clamp(Math.round(v), 0, 255).toString(16).padStart(2, '0');
+	return `#${byte(r)}${byte(g)}${byte(b)}`;
+}
+
 function clamp(value: number, min: number, max: number): number {
 	return Math.min(max, Math.max(min, value));
 }
diff --git a/web/src/lib/registry.test.ts b/web/src/lib/registry.test.ts
index 7eea275..9dc6aa3 100644
--- a/web/src/lib/registry.test.ts
+++ b/web/src/lib/registry.test.ts
@@ -50,7 +50,7 @@ describe('реестр инструментов', () => {
 		expect(tool.description.length).toBeGreaterThan(0);
 	});
 
-	it('у select дефолт входит в options, у number дефолт в диапазоне', () => {
+	it('у select дефолт входит в options, у number/slider дефолт в диапазоне', () => {
 		for (const tool of TOOLS) {
 			for (const param of tool.params) {
 				if (param.type === 'select') {
@@ -61,6 +61,11 @@ describe('реестр инструментов', () => {
 					expect(param.min === undefined || param.default >= param.min).toBe(true);
 					expect(param.max === undefined || param.default <= param.max).toBe(true);
 				}
+				if (param.type === 'slider') {
+					expect(param.min).toBeLessThan(param.max);
+					expect(param.default).toBeGreaterThanOrEqual(param.min);
+					expect(param.default).toBeLessThanOrEqual(param.max);
+				}
 				if (param.type === 'color') {
 					expect(param.default).toMatch(/^#[0-9a-f]{6}$/i);
 				}
@@ -80,7 +85,8 @@ describe('реестр инструментов', () => {
 			const output = outputOf(tool);
 			if (output?.qualityParamId) {
 				const param = tool.params.find(
-					(p): p is Extract<ParamDef, { type: 'number' }> => p.id === output.qualityParamId
+					(p): p is Extract<ParamDef, { type: 'number' | 'slider' }> =>
+						p.id === output.qualityParamId
 				);
 				expect(param).toBeDefined();
 			}
diff --git a/web/src/lib/registry.ts b/web/src/lib/registry.ts
index 76648ac..ba86b57 100644
--- a/web/src/lib/registry.ts
+++ b/web/src/lib/registry.ts
@@ -15,6 +15,15 @@ export type ParamDef =
 			step?: number;
 			default: number;
 	  }
+	| {
+			id: string;
+			label: string;
+			type: 'slider';
+			min: number;
+			max: number;
+			step?: number;
+			default: number;
+	  }
 	| {
 			id: string;
 			label: string;
@@ -179,8 +188,8 @@ export const TOOLS: ToolEntry[] = [
 		description: 'Изменяет яркость и контраст в диапазоне от −100 до +100. Значение 0 — без изменений.',
 		category: 'color',
 		params: [
-			{ id: 'brightness', label: 'Яркость', type: 'number', min: -100, max: 100, step: 1, default: 0 },
-			{ id: 'contrast', label: 'Контраст', type: 'number', min: -100, max: 100, step: 1, default: 0 }
+			{ id: 'brightness', label: 'Яркость', type: 'slider', min: -100, max: 100, step: 1, default: 0 },
+			{ id: 'contrast', label: 'Контраст', type: 'slider', min: -100, max: 100, step: 1, default: 0 }
 		],
 		run: (img, p) => brightnessContrast(img, num(p, 'brightness'), num(p, 'contrast'))
 	},
@@ -192,7 +201,7 @@ export const TOOLS: ToolEntry[] = [
 		category: 'convert',
 		params: [
 			{ id: 'background', label: 'Цвет подложки', type: 'color', default: '#ffffff' },
-			{ id: 'quality', label: 'Качество JPEG', type: 'number', min: 1, max: 100, step: 1, default: 90 }
+			{ id: 'quality', label: 'Качество JPEG', type: 'slider', min: 1, max: 100, step: 1, default: 90 }
 		],
 		output: { mime: 'image/jpeg', ext: 'jpg', qualityParamId: 'quality' },
 		run: (img, p) => flattenOntoColor(img, str(p, 'background'))
@@ -202,7 +211,7 @@ export const TOOLS: ToolEntry[] = [
 		title: 'Конвертировать PNG в WebP',
 		description: 'Перекодирует изображение в WebP с настраиваемым качеством. Прозрачность сохраняется.',
 		category: 'convert',
-		params: [{ id: 'quality', label: 'Качество WebP', type: 'number', min: 1, max: 100, step: 1, default: 90 }],
+		params: [{ id: 'quality', label: 'Качество WebP', type: 'slider', min: 1, max: 100, step: 1, default: 90 }],
 		output: { mime: 'image/webp', ext: 'webp', qualityParamId: 'quality' },
 		run: (img) => clonePixelImage(img)
 	},
@@ -214,7 +223,7 @@ export const TOOLS: ToolEntry[] = [
 		category: 'alpha',
 		params: [
 			{ id: 'targetColor', label: 'Цвет для удаления', type: 'color', default: '#00ff00' },
-			{ id: 'tolerance', label: 'Порог похожести, %', type: 'number', min: 0, max: 100, step: 1, default: 10 }
+			{ id: 'tolerance', label: 'Порог похожести, %', type: 'slider', min: 0, max: 100, step: 1, default: 10 }
 		],
 		run: (img, p) => removeColorToAlpha(img, str(p, 'targetColor'), num(p, 'tolerance')),
 		preview: (img, p) => colorMask(img, str(p, 'targetColor'), num(p, 'tolerance'))
@@ -247,7 +256,8 @@ export function sanitizeParams(
 	for (const param of tool.params) {
 		const raw = values[param.id];
 		switch (param.type) {
-			case 'number': {
+			case 'number':
+			case 'slider': {
 				const n =
 					typeof raw === 'number' && Number.isFinite(raw) ? raw : param.default;
 				out[param.id] = clampRange(n, param.min, param.max);